TOEFL TPO -1 Speaking Task 4 Sample: Using points and examples from the lecture, describe two functions of aerial roots.

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，语速适中，但偶尔有停顿。建议发言者在练习时注意掌握连贯流畅的语言表达，减少不必要的停顿。同时，注意提高发音准确性，以避免拼写错误。

4.话题发展 从话题发展方面来看，发言者提供了一个相对连贯和有组织的回答，并且在回答中使用了两个例子来支持观点。但是，在描述第二个功能时，发言者没有明确指出这个功能是吸收水分和营养。建议在练习时注意明确表达观点，并确保提供足够的支持或例子。

5.语言使用

原文：In this lecture, the professor gave us the two examples of the functions of the aerial routes. In this lecture, the professor provided two examples of aerial root functions.（将“gave us”改为“provided”，使语言更自然；将“the functions of the aerial routes”改为“aerial root functions”，使表达更准确。） But the first function is to support. The first function is support.（删除“but”，使句子更简洁；删除“is to”，使表达更自然。） He used the example of maize plant, also called as coins. He used the example of the maize plant, also known as corn.（将“called as coins”改为“known as corn”，使表达更准确。） Well, coins has a root system are fabric and shadow, which cannot support the tall plants. Corn has a fibrous and shallow root system that cannot support tall plants.（将“coins”改为“corn”，使表达正确；将“are fabric and shadow”改为“fibrous and shallow”，使表达准确；调整句子结构，使语言流畅。） As a result, it developed the aerial route so that they can go down and branch out and support sideways to protect the tall planet against the strong wind. As a result, it developed aerial roots that extend downward, branch out, and provide lateral support to protect the tall plant against strong winds.（将“the aerial route”改为“aerial roots”，使表达准确；调整句子结构，使语言流畅。） Well, the second point is the functions can help them to absorb moisture and nutrition. The second function is to help plants absorb moisture and nutrients.（调整句子结构，使语言流畅。） And he used the example of mongoose trees. He used the example of mangrove trees.（将“mongoose trees”改为“mangrove trees”，使表达正确。） And mongoose trees developed the aerial routes to absorb gases and save nutrition in order to survive because the underground root system can always under the water, so cannot function well. Mangrove trees develop aerial roots for gas absorption and nutrient storage in order to survive because their underground root systems are often submerged in water and cannot function effectively.（将“mongoose trees”改为“mangrove trees”，使表达正确；调整句子结构，使语言流畅。）

修订后的回答（140字）：

In this lecture, the professor provided two examples of aerial root functions. The first function is support. He used the example of the maize plant, also known as corn. Corn has a fibrous and shallow root system that cannot support tall plants. As a result, it developed aerial roots that extend downward, branch out, and provide lateral support to protect the tall plant against strong winds. The second function is to help plants absorb moisture and nutrients. He used the example of mangrove trees. Mangrove trees develop aerial roots for gas absorption and nutrient storage in order to survive because their underground root systems are often submerged in water and cannot function effectively.

6.思维导图

Aerial Root Functions
├─ Function 1: Support
│   └─ Example: Maize plant (corn)
│       └─ Fibrous and shallow root system
│           └─ Aerial roots for lateral support
└─ Function 2: Absorb moisture and nutrients
    └─ Example: Mangrove trees
        └─ Aerial roots for gas absorption and nutrient storage
            └─ Underground root systems often submerged in water

7.关键词