Question: Using the examples from the lecture, explain the professor's main point about how disruptive coloration helps animals avoid predators.
🎧 听力讲座
Today we're going to talk about how animals use camouflage, but specifically about a type called 'disruptive coloration.' The main point is that disruptive coloration works by breaking up an animal's outline, making it harder for predators to recognize it as a single object. Let me give you two examples. First, consider the zebra. Its black and white stripes create a pattern that confuses predators, especially when zebras are in a herd. The stripes merge together, making it difficult for a lion to single out one zebra's shape. Second, think of the killdeer, a small bird. Its breast has two black bands that cross its body. When it sits on its nest, these bands break the oval shape of the bird, so it blends with the pebbles and shadows on the ground. So, in both cases, the key is that the pattern disrupts the outline, not just matching the background color.
📝 参考答案
TOEFL Speaking Task 4 Scoring Rubric
Content Accuracy: Accurately restate the professor's main point
Information Completeness: Include key examples and details from the lecture
Language Use: Grammatical accuracy, vocabulary range, clarity
Delivery: Fluency and clarity of speech
Scored 0-30 based on holistic scoring (original 0-4, scaled to 30).
Answering Tips
Take quick notes on the main point and two examples during the lecture
Use the 20-second preparation time to organize your response
Start by stating the professor's main point, then explain with examples
Use template phrases: "The professor explains... For example..."
Keep your response within 60 seconds
🎤 免费 AI 口语评分
基于 2800+ 托福真题评分库 · 无限次免费使用
⚠️ AI 自动评分基于托福官方口语三大维度（Delivery / Language Use / Topic Development）标准开发，结果仅供练习参考。
