TOEFL Speaking Task 4 Sample: Using the professor's points and examples, summarize the lecture about ancient forms of pest control.

1.子项得分

• 交付：3

• 语言使用：3.5

• 话题发展：3.5

2.预估分数

• 总分：26

3.表达 回答中的发音大部分清晰，语速较为稳定。但在某些地方，例如 "illustrate" 应为 "use"，"beetle" 应为 "beetles" 等，发音不够准确。建议在练习时注意提高发音的准确性，并在实际考试中保持稳定的语速。

4.话题发展 回答内容基本上是连贯和有组织的，能够清楚地表达古代农民如何利用自然物质和其他动物来控制害虫。然而，在提供例子时，可以更详细地描述具体情况，以便更好地支持观点。例如，在谈到中国的例子时，可以提到柑橘树叶子被一种甲虫啃食，农民通过引入蚂蚁来消除这种害虫。总体而言，回答较好地涵盖了听力材料中的要点和例子，但在提供支持性细节方面还有改进空间。

5.语言使用

原文：The lecture revolves around the ancient practices of pest control. 10,000 years ago, people had to rely on agriculture. However, they lacked resources to illustrate chemicals to kill pests. The lecture discusses ancient methods of pest control. 10,000 years ago, people depended on agriculture, but they lacked resources to use chemicals for pest control. (将 "revolves around" 改为 "discusses" 更自然；将 "rely on" 改为 "depended on" 使时态一致；将 "illustrate" 改为 "use"，因为 "illustrate" 不符合语境。)

Thus, the professor elucidates the two practices providing examples. Therefore, the professor explains two practices with examples. (将 "elucidates" 改为更常用的词汇 "explains"，并简化句子结构。)

The first practice is to introduce natural substance that is detrimental to insects. The first practice involves introducing natural substances harmful to insects. (将 "is to introduce" 改为 "involves introducing" 更自然；将 "substance" 改为复数形式 "substances"。)

For example, people might apply animal fat, especially bear fat, on leaves of their crops. This fat could effectively remove insects. For instance, people applied animal fat, particularly bear fat, to the leaves of their crops, which effectively removed insects. (将 "might" 改为过去时态 "applied"；将 "especially" 改为 "particularly" 更自然；将两个句子合并，使句子更连贯。)

The second practice was introducing other animal species. Ancient people took advantage of natural predators of the pests that showed no interest in their crops. The second practice involved introducing other animal species, as ancient people utilized natural predators that did not harm their crops. (将 "was introducing" 改为 "involved introducing" 与第一个实践保持一致；简化句子结构，使其更连贯。)

For example, in China, people placed ants in the field to eat beetle which was a kind of pest of their crops. For example, in China, people placed ants in the fields to eat beetles, a type of pest that damaged their crops. (将 "field" 改为复数形式 "fields"；将 "beetle" 改为复数形式 "beetles"；调整句子结构，使其更自然。)

修订版（140词）：

The lecture discusses ancient methods of pest control. 10,000 years ago, people depended on agriculture but lacked resources to use chemicals for pest control. Therefore, the professor explains two practices with examples. The first practice involves introducing natural substances harmful to insects. For instance, people applied animal fat, particularly bear fat, to the leaves of their crops, which effectively removed insects. The second practice involved introducing other animal species, as ancient people utilized natural predators that did not harm their crops. For example, in China, people placed ants in the fields to eat beetles, a type of pest that damaged their crops.

6.思维导图

- Ancient Pest Control
  - Agriculture 10,000 years ago
    - Lack of chemical resources
  - Two practices
    - Introducing natural substances
      - Example: animal fat (bear fat)
    - Utilizing other animal species
      - Example: ants in China (eating beetles)

7.关键词