TOEFL Speaking Task 4 Sample:

1.子项得分

• 交付 (Delivery): 2

• 语言使用 (Language Use): 2

• 话题发展 (Topic Development): 2

2.预估分数

• 总分: 18

3.表达 在表达方面，你的回答有一些不清晰和流畅度不足的地方。例如，你可以尝试减少不必要的停顿和犹豫，并确保正确发音单词。此外，注意在句子之间使用适当的连接词，以使表达更加流畅。为了提高发音准确性，请多加练习和模仿母语人士的发音。

4.话题发展 在话题发展方面，你的回答基本上涵盖了听力材料中提到的关键信息。然而，你可以尝试更清晰地组织你的回答，以便更好地传达信息。例如，在提到城市与乡村温度差异的原因时，可以使用更明确的连接词和过渡词来引导听众。此外，在解释具体原因时，尽量提供更详细的解释和例子。这将有助于使你的回答更加完整和有说服力。

5.语言使用

原文：The professor describes a phenomenon that in the summer rural urban cities are warmer than the rural areas because of the hot island effect. The professor explains a phenomenon in which urban cities are warmer than rural areas during summer due to the heat island effect.（在这里，我们将句子结构进行了调整，使其更自然流畅。同时，我们还纠正了一些词汇错误。）

And he demonstrated two reasons to contribute such phenomenon. He provides two reasons for this phenomenon.（这里我们简化了句子结构，并使用了更准确的词汇。）

First is that the road in the urban could absorb more heat than the grass in the rural areas, and at night they would release less heat, and it made the temperature cool, release heat slowly. First, roads in urban areas can absorb more heat than grass in rural areas, and at night they release heat more slowly, leading to cooler temperatures.（我们调整了句子结构，使其更清晰，并纠正了一些语法错误。）

And the vehicle also in a main factor to contribute the heat. Additionally, vehicles are another major factor contributing to the heat.（我们重新组织了句子，使其更自然，并使用了更准确的词汇。）

修订版（140字）：

The professor explains a phenomenon in which urban cities are warmer than rural areas during summer due to the heat island effect. He provides two reasons for this phenomenon. First, roads in urban areas can absorb more heat than grass in rural areas, and at night they release heat more slowly, leading to cooler temperatures. Additionally, vehicles are another major factor contributing to the heat.

6.思维导图

- Heat Island Effect
  - Urban cities vs Rural areas
    - Warmer during summer
  - Reasons
    - Roads in urban areas
      - Absorb more heat
      - Release heat slowly at night
    - Vehicles
      - Major factor contributing to heat

7.关键词

1.子项得分

• 交付：2

• 语言使用：2

• 话题发展：2

2.预估分数

• 总分：19

3.表达 在表达方面，发音需要改进，以便更清晰地传达信息。此外，尝试保持一致的语速，并减少不必要的停顿。为了提高口语表达能力，可以多进行练习和模仿。

4.话题发展 在话题发展方面，回答中的观点和例子需要更加清晰和有组织。尝试使用更多的连接词来串联观点，并确保提供足够的支持或例子来支持你的观点。为了提高这方面的能力，可以多进行练习和参考优秀的范文。

5.语言使用

Original: The lecture mainly talks about dynamic pricing, which talks about the price will change depends on some factors. The professor, the first changes is depend on the amount of goods. For example, if an airline accomplish in a particular day and particular time in the day, and the seats will be little, and the consumer is more willing to pay for the seats, and the company will rise the price and earn more profit. The second dynamic pricing is when many competitors will sell the similar goods. For example, if we buy a boat online, and we can observe different stores.

Corrected: The lecture mainly talksdiscusses dynamic pricing, which talksrefers to how the price will change dependschanges depending on some factors. The professor, The first changes is dependchange depends on the amount of goods. For example, if an airline accomplishhas limited availability on a particular day and time, and the seats will be little,are scarce, consumers are more willing to pay for the seats, and the company will risecan raise the price and earn more profit. The second dynamic pricing factor is when many competitors sell similar goods. For example, if we buy a boatbook online, we can observecompare different stores.

(原文中的“talks”改为“discusses”，使语言更自然。将“talks about the price will change depends”改为“refers to how the price changes depending”，使句子结构更清晰。删除“The professor,”，因为它在这里没有必要。将“changes is depend”改为“change depends”，使语法正确。将“accomplish”改为“has limited availability”，使句子更清晰。将“will be little”改为“are scarce”，以提高词汇水平。将“will rise”改为“can raise”，使语法正确。将“boat”改为“book”，纠正拼写错误。将“observe”改为“compare”，以提高词汇水平。)

Revised (140 words): The lecture mainly discusses dynamic pricing, which refers to how the price changes depending on various factors. The first factor that affects dynamic pricing is the availability of goods. For instance, if an airline has limited seat availability on a specific day and time, consumers are more willing to pay for the seats due to scarcity. Consequently, the company can raise the price and earn more profit. Another factor influencing dynamic pricing is competition among sellers offering similar products. For example, when purchasing a book online, customers can compare prices across different stores. By monitoring competitors' prices and adjusting their own accordingly, businesses can attract more customers and increase sales. Overall, dynamic pricing is a strategy that allows companies to maximize profits by considering factors such as product availability and market competition.

6.思维导图

Dynamic Pricing
├─ Availability of goods
│   └─ Airline example
└─ Competition among sellers
    └─ Online bookstores example

7.关键词

1.子项得分

• 交付：3

• 语言使用：3

• 话题发展：3

2.预估分数

• 总分：23

3.表达 回答中的发音大部分清晰，语速适中，但偶尔出现停顿。为了提高发音准确性，请多加练习，注意一些单词的发音。同时，尽量减少不必要的停顿，让语言更加流畅。

4.话题发展 回答内容基本上符合题目要求，但在组织结构和论述方面还有待加强。建议在回答时先简要介绍动态定价，并明确指出两个影响因素。然后再详细阐述每个因素的具体例子和影响。这样可以让回答更加条理清晰，更具说服力。

5.语言使用

原文：The lecture is mainly about dynamic prices, which refers to the factors that affect the prices change. The lecture mainly discusses dynamic pricing, which refers to the factors that affect price changes. (将"dynamic prices"改为"dynamic pricing"，使表达更准确；调整句子结构，使语言更自然。) The first factor is the amount of goods. The first factor is the availability of goods. (用"availability"替换"amount"，使表达更准确。) If the number of goods is limited, the consumer will be more willing to pay for the goods. If the supply of goods is limited, consumers may be more willing to pay higher prices. (调整句子结构，使语言更自然。) For example, if the seats of an airline is less than before, the consumer will be willing to pay for them. For example, as airline seats become scarce, consumers may be willing to pay more for them. (调整句子结构，使语言更自然。) And the company will raise the price of the seats in order to earn more profit. Thus, the company can raise seat prices to increase profits. (调整句子结构，使语言更自然。) The second factor is the competitors selling the same product. The second factor is competitor pricing for the same products. (调整句子结构，使语言更自然。) For example, if we sell books online, we can observe other predators every day and then lower our price to win the competition. For instance, if we sell books online, we can monitor competitors' prices daily and adjust our prices accordingly to stay competitive. (调整句子结构，使语言更自然。)

修订版（140词）：

The lecture mainly discusses dynamic pricing, which refers to the factors that affect price changes. The first factor is the availability of goods. If the supply of goods is limited, consumers may be more willing to pay higher prices. For example, as airline seats become scarce, consumers may be willing to pay more for them. Thus, the company can raise seat prices to increase profits. The second factor is competitor pricing for the same products. For instance, if we sell books online, we can monitor competitors' prices daily and adjust our prices accordingly to stay competitive. By employing a dynamic pricing strategy that considers both product availability and competitor pricing, businesses can maximize their profits and maintain a strong market presence.

6.思维导图

Dynamic Pricing
├─ Factor 1: Availability of goods
│   └─ Example: Airline seats scarcity
└─ Factor 2: Competitor pricing
    └─ Example: Online book sales

7.关键词

1.子项得分 Delivery: 2 Language Use: 2 Topic Development: 1

2.预估分数

15. 3.表达

从表达方面来看，发言者的语言流利度和语速一致性有待提高。在回答中出现了一些不恰当的停顿，这可能是由于标点符号使用不当造成的。此外，发言者在发音方面也存在一定的问题，导致了一些拼写错误。建议发言者多加练习，提高口语表达能力和发音准确性。

4.话题发展 从话题发展方面来看，发言者的回答与听力材料内容不符，没有针对听力材料中提到的海洋哺乳动物如何在水中睡觉的问题进行回答。建议发言者在进行练习时注意理解听力材料的主题和关键信息，并围绕这些信息组织自己的回答。同时，注意提供充分的支持和例子来支持自己的观点。

5.语言使用

Original Answer: In the lecture, the professor discussed certain online marketing techniques, which is pretty questionable. The first technique involved pre-checking mail-list box during online purchase. Commonly, SEPTO encourages customers to join their marketing communication without explicit consent. While that often leads to unintentional sign-up, they do that in turn to increase their sales of their product. The second technique concerns the challenge of unscribing services like online magazines. While companies often make sign-up for them very easy, but unscribing is intentionally complex. For example, when you buy online magazines, which require you to make phone calls during specific hours to cancel their subscription, which is pretty exhausting. In conclusion, this technique, while that isn't illegal, but raises very concern.

Corrected Answer: In the lecture, the professor discussed certain online marketing techniques aquatic mammals' sleeping adaptations, which is pretty questionable quite interesting. The first technique adaptation involved pre-checking mail-list box during online purchase using body parts as natural flotation devices. For example, walruses have large pouches or air sacs on both sides of their necks that help them float and keep their heads above water while sleeping. The second technique concerns the challenge of unscribing services like online magazines adaptation is the ability to remain partially alert while sleeping underwater. Dolphins are an example of this; even when their bodies are asleep, a section of their brain sends signals to swim to the surface occasionally to take breaths. In conclusion, these technique adaptations allow aquatic mammals to sleep and breathe in the ocean.

(原文中的“online marketing techniques”与听力材料不符，应改为“aquatic mammals' sleeping adaptations”。原文中的“pretty questionable”不符合听力材料的语境，应改为“quite interesting”。原文中提到的两种技巧与听力材料无关，应分别改为“using body parts as natural flotation devices”和“the ability to remain partially alert while sleeping underwater”。)

Revised Answer (140 words): In the lecture, the professor discussed the fascinating adaptations of aquatic mammals, such as whales, walruses, and dolphins, that allow them to sleep in the ocean while still being able to breathe. The first adaptation involves using body parts as natural flotation devices. For instance, walruses have large pouches or air sacs on both sides of their necks that help them float and keep their heads above water while sleeping. The second adaptation is the ability to remain partially alert while sleeping underwater. Dolphins exemplify this; even when their bodies are asleep, a section of their brain sends signals to swim to the surface occasionally to take breaths. In conclusion, these adaptations enable aquatic mammals to sleep and breathe in the ocean, showcasing their remarkable ability to adapt to their environment.

6.思维导图

• Lecture Topic

  • Aquatic mammals' sleeping adaptations

• Adaptation 1

  • Natural flotation devices
    • Example: Walruses
      • Pouches or air sacs on necks

• Adaptation 2

  • Partial alertness while sleeping underwater
    • Example: Dolphins
      • Brain section sends signals to swim to the surface for breaths

• Conclusion

  • Adaptations enable aquatic mammals to sleep and breathe in the ocean

7.关键词

1.子项得分 Delivery: 3 Language Use: 3 Topic Development: 3

2.预估分数

23. 3.表达

从表达方面来看，这个回答的发音大部分是清晰的，语速也比较稳定。但是，在某些地方存在一些不必要的停顿。为了提高口语表达能力，建议在练习时注意保持流利的语速，并尽量减少不必要的停顿。同时，注意正确发音单词，以避免拼写错误。

4.话题发展 从话题发展方面来看，这个回答基本上是连贯和有组织的，思路清晰。但是，在某些地方可以进一步加强对观点的支持和举例。例如，在谈到第一个技巧时，可以提到这种做法可能会导致消费者收到大量不需要的广告邮件。在谈到第二个技巧时，可以提到这种做法可能会导致消费者长时间支付不需要的订阅费用。通过增加更多具体细节和例子，可以使回答更加充实和有说服力。

5.语言使用

Original Answer: In the lecture, the professor discussed certain online marketing techniques, which is prettyquite questionable. The first technique involves pre-checking mail lists during online purchasing. Companies often encourage customers to join their marketing communication without explicit consent. This often leads to unintentional sign-ups as many consumers overlook their pre-check box, potentially resulting in increased sales for the company. The second technique concerns the challenge of unscribingunsubscribing from services like online magazines. Companies make sign-ups for their services easy, but unscribingunsubscribing is prettyquite exhausting. For example, online magazines require customers to make phone calls during specific hours to cancel their subscription, leading to continued charges. In conclusion, this technique is illegal with ethical concern, but

(在这个回答中，将"pretty"改为"quite"，因为"quite"更正式。将"unscribing"改为正确的拼写"unsubscribing"。)

Revised Answer (140 words): In the lecture, the professor discussed certain online marketing techniques that are quite questionable in nature. The first technique involves automatically checking mailing list boxes during online purchases. Companies often encourage customers to join their marketing communications without obtaining explicit consent. This frequently leads to unintentional sign-ups, as many consumers overlook the pre-checked box, potentially resulting in increased sales for the company. The second technique pertains to the difficulty of unsubscribing from services such as online magazines or newspapers. While companies make it easy to sign up for their services, unsubscribing can be quite challenging. For instance, online magazines may require customers to make phone calls during specific hours to cancel their subscriptions, leading to ongoing charges. In conclusion, although these techniques are not illegal, they raise ethical concerns and should be carefully considered by both companies and consumers.

6.思维导图

- Online Marketing Techniques
    - Questionable Nature
        - Pre-checked mailing list boxes
            - Unintentional sign-ups
            - Increased sales
        - Difficulty of unsubscribing
            - Online magazines/newspapers
            - Challenging process
                - Phone calls during specific hours
    - Ethical Concerns
        - Not illegal, but questionable
        - Consideration by companies and consumers

7.关键词

1.子项得分

• Delivery: 3

• Language Use: 3

• Topic Development: 3

2.预估分数

• 23

3.表达 从表达方面来看，这位同学的回答基本上是清晰流畅的，语速适中，偶尔有停顿。但在某些地方，发音不够准确，导致了拼写错误。例如，“orders”应该是“odors”，建议同学在发音方面多加练习，提高准确度。

4.话题发展 从话题发展方面来看，这位同学的回答内容基本上是连贯和有条理的，观点之间关联明确，举例也比较充分。但在描述第一个能力时，“a vine can locate other plants by sensing their orders”这句话可以进一步完善为“a vine can locate other plants by sensing their odors and then grow towards them”。此外，在描述第二个能力时，“some plants can sense sounds that are produced by some caterpillars”可以改为“some plants can detect the sounds produced by caterpillars”。总体来说，同学可以在表述上更加精练和准确。

5.语言使用

Original Answer: The listening talks about two abilities that help plants to survive. The first ability is that some plants can sense orders odors (发音错误，应为odors). For example, a vine can locate other plants by sensing their orders odors (发音错误，应为odors), so they can smell a potato plant and move toward it and then get nutrition from it. The second ability is that they can react to some sounds and protect themselves. For instance, some plants can sense sounds that are produced by some caterpillars, and when the plants get these sounds, they can produce some chemicals and prevent some caterpillars from coming and eating them. So these are two sensory abilities that help plants to survive.

Corrected Answer: The listening discusses two abilities that aid plants in their survival. The first ability is that certain plants can detect odors (发音错误，应为odors). For example, a vine can locate other plants by sensing their odors (发音错误，应为odors) and subsequently grow towards them, enabling the vine to obtain nutrients from the potato plant. The second ability allows plants to respond to specific sounds for self-protection. For instance, some plants can detect the sounds produced by caterpillars; upon perceiving these sounds, the plants generate chemicals to deter caterpillars from approaching and consuming them. These two sensory abilities significantly contribute to plant survival.

Revised 140-word Answer: The listening discusses two essential abilities that aid plants in their survival. Firstly, certain plants can detect odors, allowing them to locate other plants. For example, a vine can sense the odors of nearby plants and grow towards them, obtaining nutrients from a potato plant in the process. Secondly, plants possess the ability to respond to specific sounds for self-protection. For instance, some plants can detect sounds produced by caterpillars; upon perceiving these sounds, they generate chemicals that deter caterpillars from approaching and consuming them. These two sensory abilities play a crucial role in ensuring plant survival by enabling them to locate resources and protect themselves from potential threats.

6.思维导图

• Main Topic: Plant Survival Abilities
  • Ability 1: Detecting odors
    • Example: Vines locating other plants
      • Obtaining nutrients from potato plants
  • Ability 2: Responding to specific sounds
    • Example: Plants detecting caterpillar sounds
      • Generating chemicals for self-protection

7.关键词

1.子项得分

• 交付 (Delivery): 3

• 语言使用 (Language Use): 3

• 话题发展 (Topic Development): 3

2.预估分数

• 总分: 23

3.表达 从交付方面来看，发言者的语速较为一致，但偶尔出现停顿。为了提高口语表达能力，建议发言者在练习时注意以下几点：1) 尝试保持流利且自然的语速，避免不必要的停顿；2) 注意正确发音，以免产生拼写错误；3) 在练习时多关注语音语调，使表达更加生动。通过以上方法进行练习，相信发言者的口语表达能力会有所提高。

4.话题发展 从话题发展方面来看，发言者的回答内容较为连贯和有条理，但在某些地方可以进一步完善。建议发言者注意以下几点：1) 在陈述观点时尽量使用清晰明了的句子结构，以便听众更好地理解；2) 在提供例子或证据时，可以尝试多给出一些具体细节，以增强说服力；3) 在组织内容时注意逻辑顺序和衔接词的运用，使回答更加流畅。通过以上方法进行练习，相信发言者的话题发展能力会有所提高。

5.语言使用

原文：Listening passage discusses how the parry dog can benefit the local ecosystem in two ways. The listening passage discusses how the prairie dog can benefit the local ecosystem in two ways.（将"parry dog"改为"prairie dog"，因为这是正确的动物名称。）

The first benefit is that it can provide a habitat for other animals as a shelter. The first benefit is that it provides a habitat for other animals, serving as a shelter.（将"it can provide"改为"it provides"，使句子更自然；同时将"as a shelter"改为"serving as a shelter"，使表达更清晰。）

For example, an owl can use abandoned parry dog burrows as a safe place to raise their young. For example, owls can use abandoned prairie dog burrows as safe places to raise their young.（将"an owl can use"改为"owls can use"，使句子更自然；将"parry dog burrows"改为"prairie dog burrows"，因为这是正确的动物名称。）

The burrows are underground and prevent owls' young from being exposed to their predators. The underground burrows protect the owlets from exposure to predators.（将句子简化，使表达更自然。）

Another benefit is that the parry dogs can promote the quality of the soil and make the soil more suitable for growing plants. Another benefit is that prairie dogs can improve soil quality, making it more suitable for plant growth.（将"parry dogs"改为"prairie dogs"，因为这是正确的动物名称；同时将句子简化，使表达更自然。）

For instance, water is necessary to plants growing. For instance, water is essential for plant growth.（将句子简化，使表达更自然。）

Their burrow activity loosens up the soil and the rainwater can be absorbed from the deep soil, making it easier for grass to grow near the burrows. Their burrowing activity loosens the soil, allowing rainwater to be absorbed more easily, which in turn promotes grass growth near the burrows.（将句子简化，使表达更自然。）

修订后的回答（140词）：

The listening passage discusses how the prairie dog can benefit the local ecosystem in two ways. The first benefit is that it provides a habitat for other animals, serving as a shelter. For example, owls can use abandoned prairie dog burrows as safe places to raise their young. The underground burrows protect the owlets from exposure to predators. Another benefit is that prairie dogs can improve soil quality, making it more suitable for plant growth. For instance, water is essential for plant growth. Their burrowing activity loosens the soil, allowing rainwater to be absorbed more easily, which in turn promotes grass growth near the burrows.

6.思维导图

- Prairie dog benefits
    - Habitat for other animals
        - Shelter
        - Example: owls using burrows
            - Safe places to raise young
            - Protection from predators
    - Soil quality improvement
        - Suitable for plant growth
        - Water absorption
            - Burrowing activity loosens soil
            - Promotes grass growth near burrows

7.关键词

1.子项得分

• 交付：1

• 语言使用：1

• 话题发展：1

2.预估分数

• 总分：6

3.表达 从交付方面来看，这个回答并不清晰，流畅度较差。建议练习更多的口语练习，提高发音准确度和语速。同时，注意在适当的地方停顿，以便让听众更好地理解你的观点。

4.话题发展 从话题发展的角度来看，这个回答没有明确回答问题，并且缺乏组织和连贯性。建议在准备答案时先理清思路，确保内容与问题相关，并提供足够的支持或例子。同时，注意连接各个观点，使整个回答更加有条理。

5.语言使用

原文：MBC 뉴스 김재경입니다. The passage discusses how archaeologists locate sites to dig for artifacts. (原文与问题无关，已修改为与问题相关的内容。)

修订后的答案（140字）：

The passage discusses how archaeologists locate sites to dig for artifacts. They look for certain clues, such as surface features of the land that suggest human alteration. For example, indigenous people of New Zealand built villages on top of hills and carved giant steps into them for defense. Archaeologists can still see the shape of these steps, indicating a past human settlement.

Another clue is plant life, as certain plants may indicate a previous human settlement. In Central America, indigenous people planted breadnut trees that produced edible seeds. These trees continue to reproduce, so archaeologists look for patches of breadnut trees when searching for artifacts from these people.

In conclusion, archaeologists use surface features and plant life as clues to locate potential sites for digging up artifacts from past human settlements.

6.思维导图

- Archaeologists
    - Locate sites
        - Surface features
            - Human alteration
                - Example: New Zealand villages
                    - Giant steps on hills
        - Plant life
            - Indication of human settlement
                - Example: Central America breadnut trees
                    - Edible seeds

- Conclusion
    - Surface features and plant life as clues for locating potential sites

7.关键词

1.子项得分

• 交付（Delivery）: 3

• 语言使用（Language Use）: 3

• 话题发展（Topic Development）: 3

2.预估分数

• 总分：23

3.表达 从交付方面来看，发言者的语言流利度和语速基本一致，仅有少量停顿。为了提高表达能力，建议发言者注意以下几点：1) 在练习时，尽量保持自然的语速和节奏；2) 注意正确发音，以避免拼写错误；3) 在适当的地方加入停顿，以增强语言表达的清晰度。

4.话题发展 从话题发展方面来看，发言者提供了一个连贯且组织良好的回答，并在回答中明确地阐述了观点和例子。但是，为了进一步提高话题发展能力，建议发言者注意以下几点：1) 在陈述观点时，尽量使用更具说服力的论据或例子；2) 在组织回答时，注意逻辑性和条理性，确保观点之间的联系清晰明了；3) 在练习时，尝试使用更多的衔接词和短语来连接不同的观点和论据。

5.语言使用

原文：The lecture was all about how experts find Asian sites today. The lecture discussed how experts locate ancient sites today.（将 "Asian" 改为 "ancient"，因为原文中提到的是古代遗址，而非亚洲遗址。）(将 "Asian" 改为 "ancient"，因为原文中提到的是古代遗址，而非亚洲遗址。) They use technologies such as satellites to find certain traces on the ground, in order to find where people used to live. They utilize technologies like satellites to detect specific traces on the ground, helping them identify where people once lived.（使用更高级的词汇，如 "utilize" 和 "detect"。）(使用更高级的词汇，如 "utilize" 和 "detect"。) For instance, in New Zealand, the original people built their villages on hills and made large steps on them. For example, in New Zealand, indigenous people constructed their villages on hills and created large steps on them.（使用更高级的词汇，如 "constructed" 和 "created"。）(使用更高级的词汇，如 "constructed" 和 "created"。) Experts try to use these steps to find where Asian people used to live, even though the villages are gone. Archaeologists use these steps as clues to locate ancient settlements, even if the villages have disappeared.（将 "Asian" 改为 "ancient"，并使用更专业的词汇 "archaeologists"。）(将 "Asian" 改为 "ancient"，并使用更专业的词汇 "archaeologists"。) Secondly, they also use plants to find old settlements. Additionally, they also examine plant life to identify previous settlements.（使用更高级的词汇，如 "examine" 和 "identify"。）(使用更高级的词汇，如 "examine" 和 "identify"。) Like in Central America, the people back then planted bright enough trees, and these trees keep growing in the same place. For instance, in Central America, ancient inhabitants planted breadnut trees, which continue to grow in the same location.（将 "bright enough trees" 改为正确的植物名称 "breadnut trees"。）(将 "bright enough trees" 改为正确的植物名称 "breadnut trees"。) So when experts see a branch of these trees, they will know where to dig. Thus, when archaeologists find a cluster of these trees, they can determine where to excavate.（使用更专业的词汇 "archaeologists" 和 "excavate"。）(使用更专业的词汇 "archaeologists" 和 "excavate"。)

修订版（140字）：

The lecture discussed how experts locate ancient sites today. They utilize technologies like satellites to detect specific traces on the ground, helping them identify where people once lived. For example, in New Zealand, indigenous people constructed their villages on hills and created large steps on them. Archaeologists use these steps as clues to locate ancient settlements, even if the villages have disappeared. Additionally, they also examine plant life to identify previous settlements. For instance, in Central America, ancient inhabitants planted breadnut trees, which continue to grow in the same location. Thus, when archaeologists find a cluster of these trees, they can determine where to excavate.

6.思维导图

- Lecture
  - Locate ancient sites
    - Technologies
      - Satellites
      - Detect traces on the ground
    - New Zealand
      - Indigenous people
      - Villages on hills
      - Large steps
    - Central America
      - Ancient inhabitants
      - Breadnut trees
      - Identify previous settlements

7.关键词