TOEFL TPO -1 Speaking Task 4 Sample: Using points and the examples from the talk, explain two ways of preventing food spoilage and why they are effective.

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，发言者的语音清晰，语速基本稳定，仅有少数停顿。为了提高表达能力，建议发言者在练习时注意控制停顿的频率，尽量保持流利的语速。此外，注意正确发音以避免拼写错误。

4.话题发展 从话题发展方面来看，发言者提供了一个连贯且组织良好的回答，并通过具体例子支持了观点。为了进一步提高话题发展能力，建议在练习时尝试提供更多相关细节和例子来支持论点，并确保各个观点之间有明确的联系。

5.语言使用

原文：The lecture explains two ways of preventing food spoilage and why they are effective. The lecturer discusses two methods to prevent food spoilage and their effectiveness. (将"explains"改为"discusses"，使语言更自然) The first way is to control temperature to slow down the growth of bacteria. The first method involves controlling temperature to inhibit bacterial growth. (用"inhibit"替换"slow down"，使语言更高级；用"method"替换"way") For example, if the fresh fish is freezed frozen, it can be kept for months. That's because the low temperature slows down the growth of the bacteria. In addition, the moisture is another effect. For example, compared with the dried powder milk, the liquid milk is more likely to spoil, while the dried powder milk can keep for a long time. That's because the dried powder milk doesn't have moisture, and without moisture, bacteria can't grow.

修订版（140词）：

The lecturer discusses two methods to prevent food spoilage and their effectiveness. The first method involves controlling temperature to inhibit bacterial growth. For instance, when fresh fish is frozen, its shelf life extends for months due to the low temperature hindering bacterial growth. The second method focuses on controlling moisture levels in food products. A comparison between liquid milk and powdered milk illustrates this point. Liquid milk has a higher water content and is more susceptible to spoilage, whereas powdered milk, with its moisture removed, can be stored for an extended period. The absence of moisture in powdered milk prevents bacterial growth, thus preserving the food. In conclusion, controlling temperature and moisture are two effective methods to prevent food spoilage by inhibiting bacterial growth and ensuring food remains safe for consumption.

6.思维导图

- Preventing Food Spoilage
  - Temperature Control
    - Inhibit bacterial growth
    - Example: Freezing fresh fish
  - Moisture Control
    - Bacteria need moisture to grow
    - Example: Powdered milk vs. liquid milk
  - Effectiveness
    - Preserving food safety
    - Extending shelf life

7.关键词