TOEFL Speaking Task 4 Sample: Using points and examples from the lecture, explain two adaptations that help polar bears survive in their Arctic environment

1.子项得分

Delivery: 2 Language Use: 2 Topic Development: 2

2.预估分数

总分：18

3.表达

在回答中，发音不够清晰，语速不稳定，有时会出现不必要的停顿。建议练习发音和语音连贯性，以提高口语表达能力。同时注意在适当的地方停顿，以增强语言的流畅性。

4.话题发展

回答内容虽然涉及了两个适应性特点，但没有明确地使用讲座中的例子和详细信息来支持这些观点。建议在解释适应性特点时更详细地描述讲座中提到的例子，以便更好地展示对材料的理解。此外，注意使用恰当的连接词和短语来组织回答，使其更加连贯和有条理。

5.语言使用

Original Answer: The pearl facets introduce certain body features and adaption of pearl beads when they experience extremely cold conditions. The first one is their thick fur. The dark color fur can receive more sunlight heat and it can protect the light directly on their thick skin. The second is their fur is with oil. The oil can keep water away their fur and help them to keep their warm when they are swimming.

Corrected Answer: The pearl facets The lecture (将“pearl facets”改为“the lecture”，因为原文中没有提到“pearl facets”，而是讲座的内容) introduces d (将“introduces”改为“introduced”，以保持时态一致) certain body features and adaption adaptations (将“adaption”改为“adaptations”，以保持与原文一致) of pearl beads polar bears (将“pearl beads”改为“polar bears”，因为原文中讲的是北极熊，而不是珍珠) when they experience extremely cold conditions. The first one is their thick fur. The dark colored (在“color”后面加上“ed”，使其成为形容词) fur can receive absorb (将“receive”改为“absorb”，以更准确地描述光和热的吸收过程) more sunlight heat and it can protect the light bears (将“light”改为“bears”，以保持与原文一致) directly on their thick skin. The second is their fur is with oil. The oil can keep water away their from their (在“their”前面加上“from”，以表示与水的隔离) fur and help them to keep their warm when they are swimming.

Revised Answer (140 words): The lecture introduced two key adaptations of polar bears that enable them to survive in the harsh Arctic environment. The first adaptation is their thick, dark-colored fur, which helps them retain heat from sunlight. The dark color of the fur allows it to absorb more sunlight and heat, providing insulation and warmth for the bears in the cold conditions. The second adaptation is the presence of oil in their fur, which makes it waterproof. This oily layer prevents water from soaking into the fur, ensuring that it remains an effective insulator even when the bears are swimming in icy waters. These two adaptations work together to help polar bears maintain their body temperature and thrive in their extreme habitat.

6.思维导图

- Polar bears
  - Arctic environment
    - Adaptations
      - Thick, dark-colored fur
        - Absorb sunlight and heat
        - Insulation and warmth
      - Oily fur
        - Waterproof
        - Effective insulation while swimming

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 从交付方面来看，发言者的语音清晰，流利，节奏稳定，仅有少量停顿。但在某些地方，发言者的发音不够准确，导致了拼写错误。建议发言者多加练习，提高发音准确度。此外，可以适当减少不必要的停顿，使语言更加流畅。

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两个关于北极熊适应寒冷环境的例子。然而，在解释这些例子时，可以尝试使用更丰富的词汇和表达方式来增强说服力。同时，在描述北极熊适应性特征时，可以更详细地说明其原理和作用。

5.语言使用

原文：In the lecture, the professor explains some features that help polar bears to stay warm in the freezing environment. First, they can hold the heat of the sun in their body. As we know, dark things can easily absorb heat and light color. So the skin of the polar bears are dark, are black, so it can help them absorb sunlight. And second one is that they can prevent cold water reaching their skin. As we know, polar bears have to swim in cold water for hours. If they can prevent those water ski in their body, they can keep warm. So and they have the oil further, their oil on their further. So it can repel water, means this kind of way that is waterproof. So when they swim, the water cannot come into their body.

修改后：In the lecture, the professor explains some adaptations that help polar bears stay warm in the freezing environment. First, they can retain the heat of the sun within their bodies. As we know, dark objects can easily absorb heat and light colors. Therefore, polar bear's skin is dark or black, which helps them absorb sunlight effectively. The second adaptation is that they can prevent cold water from reaching their skin. Polar bears have to swim in cold water for extended periods; if they can prevent water from soaking into their fur, they can stay warm. They have oily fur that repels water and makes it waterproof. Thus when they swim, water cannot penetrate their fur and reach their skin.（在这个修改后的版本中，我们使用了更自然的语言表达，修正了一些语法错误，并对句子结构进行了调整。）

解释：

• 将"features"改为"adaptations"（特征改为适应性），以更准确地描述北极熊的生存能力。

• 将"hold the heat"改为"retain the heat"（保持热量改为保留热量），使表达更自然。

• 将"dark things"改为"dark objects"（黑暗的东西改为黑暗的物体），使表达更准确。

• 将"are dark, are black"改为"is dark or black"（是黑暗的，是黑色的改为是黑暗的或黑色的），使句子结构更简洁。

• 将"prevent those water ski in their body"改为"prevent water from soaking into their fur"（防止那些水滑进他们的身体改为防止水浸入他们的皮毛），使表达更清晰。

• 将"the oil further, their oil on their further"改为"oily fur that repels water and makes it waterproof."（油性进一步，他们的油在他们进一步改为油性皮毛可以排斥水并使其具有防水功能。），使表达更准确。

修改后的回答（140字）：

In the lecture, the professor explains some adaptations that help polar bears stay warm in the freezing environment. First, they can retain the heat of the sun within their bodies. As we know, dark objects can easily absorb heat and light colors. Therefore, polar bear's skin is dark or black, which helps them absorb sunlight effectively. The second adaptation is that they can prevent cold water from reaching their skin. Polar bears have to swim in cold water for extended periods; if they can prevent water from soaking into their fur, they can stay warm. They have oily fur that repels water and makes it waterproof. Thus when they swim, water cannot penetrate their fur and reach their skin.

6.思维导图

- Polar bears
    - Adaptations
        - Retain heat
            - Dark or black skin
            - Absorb sunlight effectively
        - Prevent cold water from reaching skin
            - Swim in cold water for extended periods
            - Oily fur
                - Repels water
                - Waterproof

7.关键词

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: 17

3.表达 从交付方面来看，这位同学的回答有一些不清晰和流畅度不够。在发音和语速方面需要加强练习，尽量减少不必要的停顿。建议多进行口语练习，提高发音准确度和语言流利度。

4.话题发展 从话题发展方面来看，这位同学的回答基本上涵盖了两个适应性特征，但是表述和组织上还有待提高。建议在回答时更加注意逻辑性和条理性，尽量用更清晰、简洁的表述来解释这两个特征。同时，在举例子时要确保例子与论点紧密相关，并能有效支持论点。

5.语言使用

原文：Well, the professor in the biological lecture talks about the polar bear. The polar bear lives in the cold air region all the year, and they always swim in the icy cold ocean. But they have two adaptions to keep themselves warm. The fourth adaption is that they have some dark skins, which can hold the heat from the sun, because the dark color can hold in the heat of the sun, although they have some wet fur outside them. Besides of that, the polar bear always swim in the cold water, but their fur can isolate the water, it's called water blood, because they have some oily fur to prepare the water.

修正后：In the biology lecture, the professor discusses polar bears and their adaptations for living in cold regions throughout the year. Polar bears have two main adaptations to keep themselves warm. The first adaptation is their dark skin underneath their white fur, which helps absorb heat from sunlight due to its dark color. The second adaptation is their oily fur that repels water and makes it waterproof, allowing them to swim in cold waters without getting wet and maintaining insulation.

修改原因及解释：

• (将"the professor in the biological lecture talks about"改为"the professor discusses", 使表述更简洁)

• (将"cold air region"改为"cold regions", 更自然地描述寒冷地区)

• (将"two adaptions"改为"two main adaptations", 更准确地描述适应性特征)

• (将"fourth adaption"改为"first adaptation", 纠正序数词错误)

• (将"some dark skins"改为"their dark skin underneath their white fur", 更详细地描述特征)

• (将"wet fur outside them"改为"white fur", 更准确地描述熊的外观)

• (将"Besides of that"改为"The second adaptation is", 提高语言连贯性)

• (将"it's called water blood"删除, 该表述不准确)

• (将"prepare the water"改为"repels water and makes it waterproof", 更准确地描述特征)

修订版（140词）：

In the biology lecture, the professor discusses polar bears and their adaptations for living in cold regions throughout the year. Polar bears have two main adaptations to keep themselves warm. The first adaptation is their dark skin underneath their white fur, which helps absorb heat from sunlight due to its dark color. This allows them to retain heat even in the cold environment. The second adaptation is their oily fur that repels water and makes it waterproof. This feature enables polar bears to swim in cold waters without getting wet, maintaining insulation and preventing heat loss. These two adaptations play a crucial role in helping polar bears survive and thrive in the harsh Arctic conditions.

6.思维导图

- Biology Lecture
  - Polar Bears
    - Adaptations
      - Dark Skin
        - Absorbs heat from sunlight
      - Oily Fur
        - Repels water and waterproof
        - Maintains insulation while swimming in cold waters

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的，语速适中，但偶尔有些停顿。为了提高口语表达能力，建议多加练习，尤其是在连贯表达和自然停顿方面。同时注意发音的准确性，以避免拼写错误。

4.话题发展 从话题发展的角度来看，这位同学的回答内容是相关的，并且组织得相对清晰。但在解释北极熊适应北极环境的两个特点时，可以更具体地描述一下这些特点是如何帮助北极熊生存的。例如，在谈到黑色皮肤吸收阳光这一点时，可以进一步解释为什么黑色皮肤对于北极熊在寒冷环境中生存非常重要。此外，在谈到油性皮毛时，可以详细说明这种特性如何帮助保持北极熊体温。总之，在回答问题时要尽量提供更多具体的例子和详细信息，以便更好地支持观点。

5.语言使用

Original Answer: The lecture is mainly talking about polar bears' body features, which can let them live in the cold environment. The first one is polar bears have white fur and black skin, which can pull in the heat inside their body. Because black skin can absorb the sunlight and store the heat inside their body. The second one is oil fur. There is also a kind of body features that can prevent their body to touch the water. The oil fur can repel the water, which means they can be waterproof. Even when they are swimming, the water can't touch them.

Corrected Answer: The lecture mainly discusses polar bears' body features the adaptations of polar bears (将“body features”改为“adaptations”，更准确地描述北极熊的适应性特征), which enable them to survive in the cold environment. The first adaptation is that polar bears have white fur and black skin, which can pull in helps retain (将“pull in”改为“retain”，使表达更自然) the heat inside their body because black skin can absorb sunlight and store heat. The second adaptation is oil fur oily fur (将“oil fur”改为“oily fur”，使表达更准确). This feature prevents water from reaching their skin, making them waterproof. Even when they are swimming, the water can't touch their skin.

Revised Answer (140 words): The lecture mainly discusses the adaptations of polar bears that enable them to survive in the harsh Arctic environment. The first adaptation is that polar bears have white fur and black skin. The white fur helps them blend in with their surroundings, while the black skin absorbs sunlight and stores heat, allowing them to maintain their body temperature in the cold climate. The second adaptation is their oily fur, which serves as a protective barrier against water. This feature prevents water from reaching their skin, making them waterproof and ensuring that their fur remains insulating even when they are swimming in icy waters. These two adaptations play a crucial role in helping polar bears thrive in the extreme conditions of the Arctic, showcasing the remarkable ability of these animals to adapt to their environment.

6.思维导图

- Adaptations of Polar Bears
    - White fur and black skin
        - Blend in with surroundings
        - Absorb sunlight and store heat
    - Oily fur
        - Protective barrier against water
        - Waterproof and insulating
    - Survival in Arctic environment
        - Maintain body temperature
        - Thrive in extreme conditions

7.关键词

1.Sub Scores

• Delivery: 3

• Language Use: 3

• Topic Development: 3

2.Estimated Scores

• Total Score: 23

3.Delivery The speaker's delivery is generally clear and fluid, but there are some occasional pauses that could be improved. To enhance the delivery, the speaker should practice speaking at a consistent pace and work on reducing unnecessary pauses. Additionally, focusing on accurate pronunciation will help eliminate any spelling errors that may arise from mispronunciation.

4.Topic Development The response is coherent and well-organized, with clear connections between ideas and sufficient support or examples from the lecture. However, there is room for improvement in providing more detailed explanations of the adaptations. For example, the speaker could elaborate on how the black skin underneath the fur helps polar bears absorb sunlight more effectively or discuss the importance of oily fur in repelling water and maintaining insulation. By expanding on these points, the speaker will create a more comprehensive and engaging response.

5.Language Use

The professor describes two adaptations that help polar bears survive in their Arctic environment. The first adaptation is to hold in the heat of the sun. As mentioned, dark colors usually absorb more heat than the lighter colors. Therefore, the skin underneath the fur is actually black rather than white, which allows the polar bear to absorb a lot of sunlight in order to generate more heat to warm their bodies. The second adaptation is to prevent the cold from reaching their skin when they are swimming in the freezing cold water. Because of their oily fur, they can repel the water and contain the worms in their body. Therefore, that's the two adaptations of the polar bear.

Revised Answer:

The professor discusses two crucial adaptations that enable polar bears to thrive in their frigid Arctic habitat. The first adaptation involves retaining solar heat. As mentioned, darker colors typically absorb more heat compared to lighter shades. Consequently, polar bears possess black skin beneath their white fur, allowing them to capture a significant amount of sunlight and generate additional warmth for their bodies. The second adaptation aims to protect their skin from freezing water while swimming. Due to their naturally oily fur, polar bears can repel water and maintain insulation effectively. In summary, these two adaptations play a vital role in ensuring polar bears' survival in their harsh environment.

Answer statistics: {"words": 140, "unique_words": 86}

6.Mind Map

• Polar bears
  • Arctic environment
    • Adaptations
      • Retaining solar heat
        • Black skin under white fur
      • Protecting skin from cold water
        • Oily fur for insulation

7.Key Words

1.Sub Scores

• Delivery: 3

• Language Use: 3

• Topic Development: 3

2.Estimated Scores

• Total Score: 23

3.Delivery The speaker's delivery is generally clear and fluid, with a consistent pace and only occasional pauses. However, there are a few instances where the speaker could improve their pronunciation, such as "allowing them to absorb" instead of "allowing them to heat." Additionally, the speaker should work on using more natural transitions between ideas to create a smoother flow in their speech.

4.Topic Development The response is coherent and well-organized, with clear connections between ideas and sufficient support or examples from the lecture. The speaker successfully explains the two adaptations that help polar bears survive in their Arctic environment. To further improve topic development, the speaker could provide more specific details from the lecture, such as mentioning that the oily fur makes the polar bear's fur waterproof. This would strengthen the connection between the adaptation and its purpose in helping polar bears survive in their environment.

5.Language Use

Original: The professor illustrates two adaptations that help polar bears survive in their arctic environment. The first one is to hold in the heat of the sun. You know, the darker color usually absorbs more sunlight than the lighter color. Therefore, the skin underneath the fur of the polar bear is actually black rather than white. Allowing them to absorb a lot of sunlight in order to heat to warm their body. The second way is to prevent the cold from reaching their skin when they swimming in the freezing water. Because of the oily fur they had, they can repel the water in order to contain the warm in their body. Especially in the freezing water.

Corrected: The professor illustrates describes two adaptations that help polar bears survive in their Arctic environment. The first one is to hold in the heat of the sun. You know, As mentioned, (to make it sound more formal) darker colors usually absorb more sunlight than lighter colors. Therefore, the skin underneath the fur of polar bears is actually black rather than white, Allowing which allows (to improve sentence structure) them to absorb a lot of sunlight in order to heat generate heat and warm their bodies. The second adaptation is to prevent cold water from reaching their skin when they swimming are swimming (to correct grammar) in freezing water. Because of the oily fur they had have, they can repel water in order to contain retain (to use a more accurate word) warmth in their bodies, especially in freezing water.

Revised Answer (140 words): The professor describes two adaptations that help polar bears survive in their Arctic environment. The first adaptation is to hold in the heat of the sun. As mentioned, darker colors usually absorb more sunlight than lighter colors. Therefore, the skin underneath the fur of polar bears is actually black rather than white, which allows them to absorb a lot of sunlight in order to generate heat and warm their bodies. The second adaptation is to prevent cold water from reaching their skin when they are swimming in freezing water. Polar bears have oily fur, which enables them to repel water and retain warmth in their bodies, especially while swimming in freezing water. These two adaptations play a crucial role in helping polar bears survive and thrive in the harsh Arctic environment.

6.Mind Map

- Introduction
  - Professor's lecture
  - Polar bear adaptations

- Adaptation 1: Holding in heat
  - Darker colors absorb sunlight
  - Black skin under white fur
  - Generates heat to warm bodies

- Adaptation 2: Preventing cold water contact
  - Swimming in freezing water
  - Oily fur
  - Repels water and retains warmth

- Conclusion
  - Importance of adaptations for survival
  - Harsh Arctic environment

7.Key Words