1. convey v. 传达
A vibrating membrane in the ear helps to convey sounds to the brain.
耳膜的振动帮助声音传送到大脑。
2. collapse v. 坍塌
The roof collapsed under the weight of snow.
房顶在雪的重压下突然坍塌下来。
e a. 未加工的
crude oil 原油
This crude glycerin is from pure virgin vegetable oil.
这是未加工的甘油，来自纯净原始的.植物油。
4. concession n. 让步
They interpreted her silence as concession.
他们把她的沉默解读为让步。
5. defect n. 缺陷
The new car had to be withdrawn from the market because of a mechanical defect.
那种新汽车因有机械缺陷只好撤出市场。
6. deliberate a. 故意的=on purpose
It had more the appearance of a deliberate crime than an accident.
那很像是蓄意的罪行，而不像是意外的事故。
7. depress v. 使沮丧
The thought of having to take the exam again depressed me.
想到还需重新考试，我就感到沮丧。
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