TOEFL TPO 45 Speaking Task 4 Sample: Using the examples of the electric eel and the knife fish, explain how producing electricity benefits certain fish.

1.子项得分 Delivery: 2 Language Use: 2 Topic Development: 3

2.预估分数

19. 3.表达

从表达方面来看，发言者的语速较快，有时会出现不必要的停顿。建议发言者在练习时注意语速的控制，尽量保持稳定的语速，并减少不必要的停顿。此外，发言者在发音方面也需要加强练习，以提高口语表达的准确性。

4.话题发展 从话题发展方面来看，发言者对于电鳗和电刀鱼这两个例子进行了较好的解释，说明了产生电流对于某些鱼类的好处。但是，在回答中有些地方表述不够清晰，建议发言者在组织回答时更加注重逻辑性和连贯性。例如，在描述电鳗捕食过程时，可以更详细地说明电流是如何帮助电鳗捕捉到猎物的；在描述电刀鱼导航过程时，可以更清楚地解释电场是如何帮助电刀鱼感知周围环境并避开障碍物的。

5.语言使用

原文：Well, in marine biology lectures, the professor talks about two features why fish produce the electricity current. Firstly, as we all know that fish need food to survive and capture or prey. The professor uses eel as an example. Eel is a contact to fish, uses electricity current, and then they can capture fish easily. And second, they use electricity to navigate, and the professor uses knifefish to example. As we all know that some fish have poorly eyes. When the knifefish close a rock, and they can feel the rock, oh, it's near.

修改后：In the marine biology lecture, the professor discusses two reasons why fish produce electric currents. First, as we all know, fish need food to survive and capture prey. The professor uses the electric eel as an example. The eel generates an electric current which allows it to easily capture other fish. Second, some fish use electricity for navigation; the professor cites the knifefish as an example. As we know, some fish have poor eyesight. When the knifefish approaches a rock, it can sense its presence due to disturbances in its electric field and avoid it.（在这段回答中，我们对句子结构、词汇和语法进行了修改，以使其更自然流畅。例如，我们将“eel is a contact to fish”修改为“the eel generates an electric current”，使句子更清晰易懂。同时，我们还对一些表述进行了调整，如将“they use electricity to navigate”改为“some fish use electricity for navigation”。）

修订版（140词）：

In the marine biology lecture, the professor discusses two reasons why certain fish produce electric currents. The first reason is related to their need for food and capturing prey. The professor uses the electric eel as an example to illustrate this point. The eel generates an electric current in its body, which allows it to easily capture and paralyze other fish, ensuring that it gets the food it needs to survive. The second reason is that some fish use electricity for navigation, particularly those with poor eyesight. The professor cites the knifefish as an example of this phenomenon. When the knifefish approaches a rock or any other obstacle, it can sense its presence due to disturbances in its electric field, allowing it to avoid potential harm and navigate its environment successfully.

6.思维导图

• Marine Biology Lecture
  • Electric Currents
    • Reason 1: Capturing Prey
      • Example: Electric Eel
    • Reason 2: Navigation
      • Example: Knifefish
        • Poor Eyesight
        • Sensing Obstacles

7.关键词