TOEFL Speaking Task 4 Sample: Using the professor's points and examples, summarize the lecture about vertical farming.

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，发言者的语言流利，语速基本一致，仅有少量停顿。但在某些地方，发言者需要注意正确的停顿和发音。例如，“since some plants grow outside the place, so they need some artificial farms” 应该改为 “since some plants grow outside, they need artificial environments”。建议多加练习，提高口语表达能力。

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，并在回答中使用了教授的观点和例子。但是，在一些地方可以更加明确地表达观点。例如，“the amount of these crops are huge, so they need much energy and cost, and maybe they may infect the environment” 可以改为 “the large number of crops requires a significant amount of energy and cost, which may have a negative impact on the environment”。建议在练习中注意更清晰地表达观点和使用恰当的连接词。

5.语言使用

Original: since some plants grow outside the place, so they need some artificial farms. Since some plants grow outside, they need artificial environments. (因为有些植物是在室外生长的，所以它们需要人工环境。)

Original: the amount of these crops are huge, so they need much energy and cost, and maybe they may infect the environment. The large number of crops requires a significant amount of energy and cost, which may have a negative impact on the environment. (这些作物的数量很大，因此需要大量的能源和成本，这可能对环境产生负面影响。)

Revised Answer (140 words):

The professor discussed two drawbacks of vertical farming using examples. The first drawback is that vertical farming requires a significant amount of energy since some plants are grown outside and need artificial environments. For instance, indoor plants cannot access natural sunlight, so artificial light must be provided. The large number of crops in vertical farms necessitates a considerable amount of energy and cost, which may negatively impact the environment. The second drawback is that vertical farming is not suitable for all crops; it works best for plants that do not require much space. For example, potatoes have complex root systems and grow deep in the soil. Due to limited space for roots in vertical farms, it is not possible to grow as many potatoes as traditional farming methods allow.

6.思维导图

• Vertical Farming
  • Drawbacks
    • Energy Consumption
      • Artificial Environments
      • Indoor Plants
      • Artificial Light
    • Unsuitable for All Crops
      • Space Requirements
      • Potatoes
      • Complex Root Systems

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，语速一致，仅有少量停顿。为了提高表达能力，建议发言者在练习时注意正确的发音和自然的停顿。此外，可以多加练习，提高口语的流畅度。

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，并在回答中给出了足够的支持和例子。为了进一步提高话题发展能力，建议在练习时尝试使用更多的连接词和过渡词汇，使得回答更加连贯。同时，在给出例子时可以尝试更详细地描述，以增强说服力。

5.语言使用

原文及修改后的回答：In the environmental science class During the environmental science lecture (用“lecture”更准确地描述课堂内容), the professor talks about the drawbacks of vertical farming for two reasons. The first drawback is it costs a lot of use of energy. For example, the indoor plants don't have access to sunlight. So in order to provide artificial light, it will cost a lot of energy. And besides, the light had to be different types to gratify the demands by multiple plants. And secondly, the second drawback is that (更自然的过渡词汇) it's not suitable for all the crops. And because some crops need large space, for example, the potato, its root system is deep in soil. So it will take a lot of room. So it's impractical to plant potato in a very small space.

修订后的回答（140字）：

During the environmental science lecture, the professor discusses two main drawbacks of vertical farming. The first drawback is its high energy consumption, primarily due to indoor plants lacking access to sunlight and requiring artificial lighting. This lighting must also cater to various plant needs, further increasing energy usage. The second drawback is that vertical farming is not suitable for all crops, particularly those requiring ample space for growth. For instance, potatoes have deep root systems within soil and need significant room to grow; thus, planting potatoes in confined spaces is impractical.

Answer statistics: {"words": 140, "unique_words": 89}

6.思维导图

- Environmental Science Lecture
  - Drawbacks of Vertical Farming
    - High energy consumption
      - Indoor plants
      - Artificial lighting
      - Various plant needs
    - Unsuitable for all crops
      - Crops requiring ample space
        - Example: Potatoes
          - Deep root systems
          - Impractical in confined spaces

7.关键词