TOEFL Speaking Task 3 Sample: Explain how the example in the lecture illustrates the concept of dimorphism.

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

2.预估分数

19. 3.表达

在表达方面，发言者的语速和停顿需要改进。建议练习更清晰、流畅的发音，并保持一致的语速。同时，注意在适当的地方停顿，以提高整体表达效果。此外，需要注意准确发音以避免拼写错误。

4.话题发展 The response does a decent job of explaining the concept of dimorphism using the example from the lecture. However, it could be improved by providing a clearer and more concise summary of the main points from both the reading and listening passages. Additionally, it would be helpful to emphasize the connection between the differences in appearance and their roles in survival for both male and female birds of paradise. To improve topic development, focus on organizing your response more effectively and providing stronger support for your main points.

5.语言使用

Original Answer: The lecture first points out the color and the body shape difference between the male birds and the female birds by explaining the male birds has the bright color and large body while the female birds has smaller and green and brown colors of the body Second, the lecture explains that while the female birds sit on the nest it may attract less attention of the enemies and keep both safe of the nest

Corrected Answer: The lecture first highlights the differences in color and body shape between male and female birds, explaining that male birds have bright colors and larger bodies, while female birds have smaller bodies with green and brown colors. Secondly, the lecture explains that when female birds sit on their nests, they attract less attention from predators, ensuring the safety of both themselves and their offspring. (在这个修改后的回答中，我们使用了更自然的语言风格，修正了语法错误，并提供了更清晰的表述。)

Revised Answer (140 words): The concept of dimorphism is illustrated in the lecture through the example of birds of paradise. The lecturer emphasizes that there are significant differences in color and body shape between male and female birds. Male birds possess bright colors, such as red, yellow, blue, and green, as well as larger bodies. In contrast, female birds have smaller bodies with more subdued green and brown colors. These differences in appearance serve specific purposes for each gender. The vibrant colors of male birds help them attract mates, ensuring successful reproduction. On the other hand, the duller colors of female birds allow them to blend in with their surroundings when sitting on their nests. This camouflage helps protect them from predators, ensuring the safety of both themselves and their offspring. In this way, dimorphism plays a crucial role in the survival of birds of paradise.

6.思维导图

- Dimorphism
  - Birds of paradise
    - Male birds
      - Bright colors
      - Larger bodies
      - Attract mates
    - Female birds
      - Smaller bodies
      - Green and brown colors
      - Camouflage
        - Blend with surroundings
        - Protect from predators
        - Ensure safety of offspring

7.关键词