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Unit 1

average: （a.）ordinary

men of average ability能力普通的人 (n.)平均数

An average of 10 students were absent each day. “an average of + 复数名词”作主语，谓语用复数 “the average of +复数名词”作主语，谓语用单数 The average of these numbers is 50. necessarily(ad.): inevitably 必定地，必要地

The old do not necessarily know more than the young. 未必，不一定

(adj.)necessary必要的，必须的which has to be done it’s necessary for sb. to do sth.某人有必要做某事，不能按汉语意思用“人“作主语

it’s necessary + that 从句时，从句谓语用“should +动词原形”

It’s necessary that he (should)buy a dictionary. Suggest that sb (should) do sth. Suggest doing sth.

His expression suggests that he is tired.(=indicate) case: actual condition实情

Is it the case(=Is it true) that you have lost all your money? in case: （1）如果，万一（表示条件）； （2）以防，免得（表示目的）

在此两种情况下，要表示将来通常用一般现在时而非一般将来时。

Take an umbrella, in case it rains. In case he comes, let me know. In case of fire, ring the bell.万一，以防 in the case of至于，就….来说 in any case无论如何 in no case决不

additional(a.): added, extra

addition(n.) in addition to 除…以外 In addition to lending me his typewriter, he taught me how to use it.

aside(adv.): to the side在旁边 aside from除…外= apart from

Aside from being fun and good exercise, swimming is a very useful skill.

assignment (c. n.): sth given out as a task任务，工作 He was sent abroad on a difficult assignment.执行任务 (v.)assign指派某人作某事（可接双宾语，也可在直接宾语前

用介词to）

assign sb. sth. = assign sth. to sb.给某人分配某物

The boss assigned him (to) an important task.(assign sb.(to)sth.) These rooms have been assigned to us. occupy:

(1)占用，占据，充满（被占据的东西作其宾语） His books occupy a lot of space.

Many cares and anxieties occupied his mind. （2）使忙于

occupy oneself in doing sth( with sth.)/ be occupied in doing sth./ with sth.

The newcomers were occupied in writing letters home. (adj.)occupied忙的（其前习惯上不用very 修饰，用fully, wholly, busily, solely）

She is fully occupied with three small children.

hobby:业余爱好(c.n.)(多指业余时间培养起来的并需一定专业只是积累的个人爱好，一般是健康的，有益的) Everyone should have a good hobby. My hobby is that I collect stamps.(false) collecting(to collect) stamps

从逻辑上说，“我的爱好”应该是collecting stamps这件事情，