英語學習：考研必背核心詞組

on a diet 吃某種特殊飲食, 節食

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diet 原始涵義：名詞 n.

1.日常飲食，日常食物

2.規定飲食，規定飲食的時期

vt. & vi. (使)節制飲食 He is dieting.他在節食。

不及物動詞 vi.

節食;進規定飲食

造句：You must go on a diet because you are too fat.

你必須限定飲食因爲你太胖了。

differ from…in 與…的區別在於…

differ 原始涵義：vi.

1.不同, 有異

Nylon and silk differ.尼龍與絲綢不同。

2.持異議

The two brothers differed about politics.這兄弟倆政見不同。

真 題 重 現 ： When at four, a child's language differs from that of his parents in style rather than grammar.(1993 閱讀)

造句：Things in the world differ from each other in a thousand ways.

世界上的事物是千差萬別的。

in difficulties…有困難,處境困難,

造句：You can always fal back upon him when in difficulties

遇到困難時，你隨時可以找他幫忙。

discharge sb. (from)…for 因…解僱, 開除

同義替換：= dismiss sb. From… for

discharge 原始涵義：vt.

1.卸船

2.償還

He has discharged his debts.他已把債務償清。

3.執行; 履行

She discharged all the responsibilities of a minister conscientiously.

她自覺地履行部長的一切職責。

4.免…的職，撤職;解僱，開除;使退伍

The boss discharged her because of her absence.老闆因她缺勤而把她解僱了。

fal back 撤退; in disorder 慌亂地, 狼狽不堪

fall back 同義替換：= retreat=turn back

造句：Our attack was so vigorous that the enemy had to fall back.

我們的進攻是那樣猛烈，使得敵人不得不撤退。

Badly beaten, the intruders fell back in disorder.

入侵者受到重創，狼狽潰退。