TOEFL Speaking Task 4 Sample: Using points and examples from the lecture, explain two adaptations that help polar bears survive in their Arctic environment

1.子项得分

Delivery: 2 Language Use: 2 Topic Development: 2

2.预估分数

总分：18

3.表达

在回答中，发音不够清晰，语速不稳定，有时会出现不必要的停顿。建议练习发音和语音连贯性，以提高口语表达能力。同时注意在适当的地方停顿，以增强语言的流畅性。

4.话题发展

回答内容虽然涉及了两个适应性特点，但没有明确地使用讲座中的例子和详细信息来支持这些观点。建议在解释适应性特点时更详细地描述讲座中提到的例子，以便更好地展示对材料的理解。此外，注意使用恰当的连接词和短语来组织回答，使其更加连贯和有条理。

5.语言使用

Original Answer: The pearl facets introduce certain body features and adaption of pearl beads when they experience extremely cold conditions. The first one is their thick fur. The dark color fur can receive more sunlight heat and it can protect the light directly on their thick skin. The second is their fur is with oil. The oil can keep water away their fur and help them to keep their warm when they are swimming.

Corrected Answer: The pearl facets The lecture (将“pearl facets”改为“the lecture”，因为原文中没有提到“pearl facets”，而是讲座的内容) introduces d (将“introduces”改为“introduced”，以保持时态一致) certain body features and adaption adaptations (将“adaption”改为“adaptations”，以保持与原文一致) of pearl beads polar bears (将“pearl beads”改为“polar bears”，因为原文中讲的是北极熊，而不是珍珠) when they experience extremely cold conditions. The first one is their thick fur. The dark colored (在“color”后面加上“ed”，使其成为形容词) fur can receive absorb (将“receive”改为“absorb”，以更准确地描述光和热的吸收过程) more sunlight heat and it can protect the light bears (将“light”改为“bears”，以保持与原文一致) directly on their thick skin. The second is their fur is with oil. The oil can keep water away their from their (在“their”前面加上“from”，以表示与水的隔离) fur and help them to keep their warm when they are swimming.

Revised Answer (140 words): The lecture introduced two key adaptations of polar bears that enable them to survive in the harsh Arctic environment. The first adaptation is their thick, dark-colored fur, which helps them retain heat from sunlight. The dark color of the fur allows it to absorb more sunlight and heat, providing insulation and warmth for the bears in the cold conditions. The second adaptation is the presence of oil in their fur, which makes it waterproof. This oily layer prevents water from soaking into the fur, ensuring that it remains an effective insulator even when the bears are swimming in icy waters. These two adaptations work together to help polar bears maintain their body temperature and thrive in their extreme habitat.

6.思维导图

- Polar bears
  - Arctic environment
    - Adaptations
      - Thick, dark-colored fur
        - Absorb sunlight and heat
        - Insulation and warmth
      - Oily fur
        - Waterproof
        - Effective insulation while swimming

7.关键词

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，流利，节奏稳定，仅有少量停顿。但在某些地方，发言者的发音不够准确，导致了拼写错误。建议发言者多加练习，提高发音准确度。此外，可以适当减少不必要的停顿，使语言更加流畅。

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，并在回答中明确地阐述了两个关于北极熊适应寒冷环境的例子。然而，在解释这些例子时，可以尝试使用更丰富的词汇和表达方式来增强说服力。同时，在描述北极熊适应性特征时，可以更详细地说明其原理和作用。

5.语言使用

原文：In the lecture, the professor explains some features that help polar bears to stay warm in the freezing environment. First, they can hold the heat of the sun in their body. As we know, dark things can easily absorb heat and light color. So the skin of the polar bears are dark, are black, so it can help them absorb sunlight. And second one is that they can prevent cold water reaching their skin. As we know, polar bears have to swim in cold water for hours. If they can prevent those water ski in their body, they can keep warm. So and they have the oil further, their oil on their further. So it can repel water, means this kind of way that is waterproof. So when they swim, the water cannot come into their body.

修改后：In the lecture, the professor explains some adaptations that help polar bears stay warm in the freezing environment. First, they can retain the heat of the sun within their bodies. As we know, dark objects can easily absorb heat and light colors. Therefore, polar bear's skin is dark or black, which helps them absorb sunlight effectively. The second adaptation is that they can prevent cold water from reaching their skin. Polar bears have to swim in cold water for extended periods; if they can prevent water from soaking into their fur, they can stay warm. They have oily fur that repels water and makes it waterproof. Thus when they swim, water cannot penetrate their fur and reach their skin.（在这个修改后的版本中，我们使用了更自然的语言表达，修正了一些语法错误，并对句子结构进行了调整。）

解释：

• 将"features"改为"adaptations"（特征改为适应性），以更准确地描述北极熊的生存能力。

• 将"hold the heat"改为"retain the heat"（保持热量改为保留热量），使表达更自然。

• 将"dark things"改为"dark objects"（黑暗的东西改为黑暗的物体），使表达更准确。

• 将"are dark, are black"改为"is dark or black"（是黑暗的，是黑色的改为是黑暗的或黑色的），使句子结构更简洁。

• 将"prevent those water ski in their body"改为"prevent water from soaking into their fur"（防止那些水滑进他们的身体改为防止水浸入他们的皮毛），使表达更清晰。

• 将"the oil further, their oil on their further"改为"oily fur that repels water and makes it waterproof."（油性进一步，他们的油在他们进一步改为油性皮毛可以排斥水并使其具有防水功能。），使表达更准确。

修改后的回答（140字）：

In the lecture, the professor explains some adaptations that help polar bears stay warm in the freezing environment. First, they can retain the heat of the sun within their bodies. As we know, dark objects can easily absorb heat and light colors. Therefore, polar bear's skin is dark or black, which helps them absorb sunlight effectively. The second adaptation is that they can prevent cold water from reaching their skin. Polar bears have to swim in cold water for extended periods; if they can prevent water from soaking into their fur, they can stay warm. They have oily fur that repels water and makes it waterproof. Thus when they swim, water cannot penetrate their fur and reach their skin.

6.思维导图

- Polar bears
    - Adaptations
        - Retain heat
            - Dark or black skin
            - Absorb sunlight effectively
        - Prevent cold water from reaching skin
            - Swim in cold water for extended periods
            - Oily fur
                - Repels water
                - Waterproof

7.关键词

1.子项得分

• 交付 (Delivery): 2

• 语言使用 (Language Use): 2

• 话题发展 (Topic Development): 2

2.预估分数

• 总分: 17

3.表达 从交付方面来看，这位同学的回答有一些不清晰和流畅度不够。在发音和语速方面需要加强练习，尽量减少不必要的停顿。建议多进行口语练习，提高发音准确度和语言流利度。

4.话题发展 从话题发展方面来看，这位同学的回答基本上涵盖了两个适应性特征，但是表述和组织上还有待提高。建议在回答时更加注意逻辑性和条理性，尽量用更清晰、简洁的表述来解释这两个特征。同时，在举例子时要确保例子与论点紧密相关，并能有效支持论点。

5.语言使用

原文：Well, the professor in the biological lecture talks about the polar bear. The polar bear lives in the cold air region all the year, and they always swim in the icy cold ocean. But they have two adaptions to keep themselves warm. The fourth adaption is that they have some dark skins, which can hold the heat from the sun, because the dark color can hold in the heat of the sun, although they have some wet fur outside them. Besides of that, the polar bear always swim in the cold water, but their fur can isolate the water, it's called water blood, because they have some oily fur to prepare the water.

修正后：In the biology lecture, the professor discusses polar bears and their adaptations for living in cold regions throughout the year. Polar bears have two main adaptations to keep themselves warm. The first adaptation is their dark skin underneath their white fur, which helps absorb heat from sunlight due to its dark color. The second adaptation is their oily fur that repels water and makes it waterproof, allowing them to swim in cold waters without getting wet and maintaining insulation.

修改原因及解释：

• (将"the professor in the biological lecture talks about"改为"the professor discusses", 使表述更简洁)

• (将"cold air region"改为"cold regions", 更自然地描述寒冷地区)

• (将"two adaptions"改为"two main adaptations", 更准确地描述适应性特征)

• (将"fourth adaption"改为"first adaptation", 纠正序数词错误)

• (将"some dark skins"改为"their dark skin underneath their white fur", 更详细地描述特征)

• (将"wet fur outside them"改为"white fur", 更准确地描述熊的外观)

• (将"Besides of that"改为"The second adaptation is", 提高语言连贯性)

• (将"it's called water blood"删除, 该表述不准确)

• (将"prepare the water"改为"repels water and makes it waterproof", 更准确地描述特征)

修订版（140词）：

In the biology lecture, the professor discusses polar bears and their adaptations for living in cold regions throughout the year. Polar bears have two main adaptations to keep themselves warm. The first adaptation is their dark skin underneath their white fur, which helps absorb heat from sunlight due to its dark color. This allows them to retain heat even in the cold environment. The second adaptation is their oily fur that repels water and makes it waterproof. This feature enables polar bears to swim in cold waters without getting wet, maintaining insulation and preventing heat loss. These two adaptations play a crucial role in helping polar bears survive and thrive in the harsh Arctic conditions.

6.思维导图

- Biology Lecture
  - Polar Bears
    - Adaptations
      - Dark Skin
        - Absorbs heat from sunlight
      - Oily Fur
        - Repels water and waterproof
        - Maintains insulation while swimming in cold waters

7.关键词