托福TPO/Official 63 Task 3口语原文独立/综合口语题目答案解析-范文音频翻译【新东方在线】

Official 63 Task 3

上一题

下一题

Reading

Near-Field Sound Detection

Some animals are able to use sound to avoid predators. When sound is produced, it creates vibrations in the surrounding air. These vibrations are known as near-field sounds because they originate, or begin, near the sound source. Most animals are unable to detect these kinds of sounds; however. some animals have an ability known as near-field sound detection. This ability allows certain animals to detect vibrations or near-field sounds produced by potential predators. Animals with near-field sound detection abilities have special physical features that allow them to sense an approaching predator and take action to protect themselves.

精听文本

Listening

00:00

查看文本

Narrator: Now listen to part of a lecture in a biology class.

Professor: Ok, so let's look at an example of this with insects. Take caterpillars, for example. Some caterpillars have this ability.

Now say there's a caterpillar crawling along on a branch in a tree, just minding its own business. And then some dangerous insect, like a wasp, flies toward the tree. The caterpillar could be in trouble.

The wasp might try to eat the caterpillar. It's a threat. Now a lot of other animals may not hear the wasp or notice that it's close by.

But fortunately for the caterpillar, there are these really tiny hairs on the caterpillars' skin, little hairs that stick out into the air around the caterpillar.

And when the wasp flies toward the tree, the beating of its wings makes a sound, which sends out vibrations or small movements in the air, which make the caterpillars tiny hairs move, so it senses the presence of the wasp.

So once the caterpillar realizes something is flying toward it, and it might be a wasp, the caterpillar will just drop off the branch it has been crawling on and fall to a lower branch or to the ground. And this way, the wasp is likely to just fly right by without ever catching the caterpillar, and the caterpillar will be safe.

Question

Explain how the example from the professor's lecture illustrates the concept of near-field sound detection.

覆盖考试

北美留学考试	英联邦留学考试	专业问答
TOEFL	IELTS	雅思专业问答
GRE	A Level	托福专业问答
GMAT	PTE	GRE专业问答
SAT	Interchange	GMAT专业问答
ACT	英本精英计划
AP/SSAT/IB
美高先修课
美本精英计划
美研精英计划

备考工具

备考App

新东方出国考试
新东方雅思Pro
新东方托福Pro

小程序

新东方在线国际择校通
新东方雅思Pro
新东方在线留学微课

扫码关注公众号

京ICP备2024050960号-2 信息网络传播视听许可证：0110531 营业执照京公网安备11010802044296号 ICP许可证编号：京B2-20241156