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

1.子项得分

• 交付：2

• 语言使用：2

• 主题发展：2

2.预估分数

• 总分：19

3.表达 从交付方面来看，发言者的语速较快，有时不太清晰。建议发言者放慢语速，注意发音的准确性。此外，尽量避免过多的停顿和重复词汇。

4.话题发展 从话题发展方面来看，发言者提到了电鳗和刀鱼这两个例子，但在解释这两种鱼如何利用电流时，描述不够详细和准确。建议发言者在描述这两种鱼的特点时更加具体和详细，以便更好地阐述它们如何利用电流捕捉猎物和避免障碍物。同时，注意使用正确的词汇和表达方式。

5.语言使用

原文：So, the electric eel and the night fish have different abilities of using this electric current that shocks things. The electric eel and the knifefish have distinct abilities to utilize the electric current that emits shocks.（将night fish改为knifefish，使描述更准确；将different abilities of using改为distinct abilities to utilize，使表达更自然。）

So, the electric eel, it shocks the fish nearby them, the smaller fish as it approaches and paralyzes them. The electric eel shocks nearby smaller fish as it approaches them, causing paralysis.（简化句子结构，使表达更流畅。）

So, it catches it easier and the small fish cannot go away and it's at its leader time. Thus, it captures its prey easily, and the small fish cannot escape while being paralyzed.（修改表达方式，使句子更通顺。）

While the night fish uses an electric field because it doesn't have a good sighting and the water might be muddy and not very easy to seeable through it. On the other hand, the knifefish uses an electric field due to its poor vision and difficulty seeing through murky water.（将night fish改为knifefish，修改表达方式，使句子更通顺。）

So, it uses electric field and when something is nearby them, for example a rock, it creates a disturbance in their electric field and they feel it so they will not crash into the rock while making it not that easy to just crash into random things and hurt themselves. It generates an electric field, and when an object, such as a rock, is nearby, it creates a disturbance in the field. The knifefish senses this disturbance and avoids colliding with the rock, preventing injury.（简化句子结构，使表达更流畅。）

修订后的回答（140字）：

The electric eel and the knifefish have distinct abilities to utilize the electric current that emits shocks. The electric eel shocks nearby smaller fish as it approaches them, causing paralysis. Thus, it captures its prey easily, and the small fish cannot escape while being paralyzed. On the other hand, the knifefish uses an electric field due to its poor vision and difficulty seeing through murky water. It generates an electric field, and when an object, such as a rock, is nearby, it creates a disturbance in the field. The knifefish senses this disturbance and avoids colliding with the rock, preventing injury.

6.思维导图

- Electric eel
  - Shocks smaller fish
  - Causes paralysis
  - Easy capture of prey

- Knifefish
  - Poor vision
  - Electric field generation
  - Detects nearby objects (e.g., rocks)
  - Avoids collisions and injury

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 在交付方面，说话者的语速较为稳定，但有时会出现不必要的停顿。为了提高口语表达能力，建议说话者注意在适当的地方停顿，以增强语言的连贯性。此外，尽量保持发音准确，以避免拼写错误。

4.话题发展 在话题发展方面，说话者成功地使用了电鳗和刀鱼的例子来解释产生电流对某些鱼类的好处。然而，回答中有一些句子表达不够清晰，如“Say the eel need to shock and parallel their food so they can capture them easily.” 建议说话者在组织回答时更加注意句子结构和表达清晰度。同时，在解释刀鱼如何利用电场导航时，可以进一步详细说明这一过程。

5.语言使用

原文：There are fishes that can produce electricity in the ocean, Some fish can produce electricity in the ocean, (将复数形式改为单数形式，使句子更自然) which is a special ability that this fish have, and there are two beneficial benefits for that. which is a unique ability these fish possess, providing them with two significant advantages. (用更高级的词汇和更清晰的表达替换原句) To begin with, the professor narrates about capturing food, giving an example of eels. Say the eel need to shock and parallel their food so they can capture them easily. The electric eel shocks and paralyzes its prey, allowing it to capture them effortlessly. (修改句子结构，使表达更清晰) And besides, the professor states about the benefits of navigating the place. To support this, the professor provides an instance of knife fish. When knife fish are crossing a dark place, When knifefish navigate through dark environments, (改进表达，使其更自然) it can use the electricity to navigate, so they use their electric field to detect nearby objects and avoid obstacles. (修改句子结构，使表达更清晰)

修订版（140词）：

Some fish can produce electricity in the ocean, which is a unique ability these fish possess, providing them with two significant advantages. To begin with, the ability to generate electricity aids in capturing food. The professor illustrates this point by discussing electric eels. The electric eel shocks and paralyzes its prey, allowing it to capture them effortlessly. This ensures that the eel gets the food it needs to survive.

In addition, producing electricity helps fish navigate their environment more effectively. The professor uses the example of knifefish to support this claim. When knifefish navigate through dark environments, they use their electric field to detect nearby objects and avoid obstacles. This ability allows them to successfully maneuver through their surroundings without harming themselves, further demonstrating the benefits of producing electricity for certain fish species.

6.思维导图

- Fish producing electricity
    - Unique ability
    - Two significant advantages
        - Capturing food
            - Electric eel
                - Shocks and paralyzes prey
                - Effortless capture
        - Navigating environment
            - Knifefish
                - Electric field
                - Detect nearby objects and avoid obstacles

7.关键词

1. Sub Scores

• Delivery: 3

• Language Use: 3

• Topic Development: 3

2. Estimated Scores

• Total Score: 23

3. Delivery The speaker's delivery is generally clear and fluid, but there are occasional pauses and minor pronunciation issues. To improve, the speaker should practice speaking at a consistent pace and work on pronouncing certain words more accurately. Additionally, focusing on proper punctuation will help with the flow of the speech.

4. Topic Development The response is coherent and well-organized, with clear connections between ideas and sufficient support or examples. However, there are some minor errors in the content, such as referring to the "night fish" instead of the "knife fish." To improve topic development, the speaker should double-check their understanding of the content and ensure that all examples are accurate and relevant to the question being answered.

5. Language Use

Original Answer: The first benefit is that it can help them capture prey providing reliable food resource. For example, the electronic eel can produce strong current. When they connect to small fish, the current will shock and paralyze the fish. As a result, the eels can capture the fish with ease and eat at leisure. The second benefit is that they can navigate by detecting the surrounding objects. Because fish do not have good eyes and their surroundings are always muddy or dark. For example, the night fish, when they get closer to a rock, they will sense and interfere with their current. They then realize that there is a rock, they will avoid crashing into it and without harming it.

Corrected Answer: The first benefit is that it can help them capture prey, providing a reliable food resource food source ("food source" is more appropriate than "food resource"). For example, the electronic electric (correcting the term to "electric") eel can produce a strong current. When they connect come into contact ("come into contact" is more accurate than "connect") with small fish, the current will shock and paralyze the fish. As a result, the eels can capture the fish with ease and eat at leisure. The second benefit is that they can navigate by detecting surrounding objects because fish do not have good eyesight and their surroundings are often muddy or dark. For example, the night knife (correcting the term to "knife") fish, when they get closer to a rock, will sense and interfere detect interference ("detect interference" is more accurate than "interfere") with their current. They then realize that there is a rock and will avoid crashing into it without harming themselves.

Revised Answer (140 words): The first benefit of producing electricity for certain fish is that it helps them capture prey, providing a reliable food source. For instance, the electric eel can generate a strong current. When it comes into contact with smaller fish, the current shocks and paralyzes them. Consequently, the eel can easily capture its prey and consume it at leisure. The second advantage is enhanced navigation by detecting surrounding objects. This is particularly useful for fish with poor eyesight living in murky or dark environments. For example, the knife fish can sense and detect interference with its electric field when approaching an obstacle like a rock. Upon realizing the presence of the rock, the knife fish avoids collision, preventing any harm to itself.

6. Mind Map

- Producing Electricity
  - Benefits
    - Capture Prey
      - Electric eel
        - Strong current
        - Paralyze prey
    - Navigate Environment
      - Knife fish
        - Detect objects
        - Electric field interference

7. Key Words