every other . alternate每隔一（个）

We have English lessons every other day．我们每隔一天上一次英语课。

I go there every other week．每隔一周我去那儿一趟。

every other . all others所有其他的

Tom was early；every other boy was late．汤姆来得早，而其他男孩一个个都迟到了。

every so often . once in a while；occasionally 时时；常常

I no longer see him regularly，but every so often he drops in at my office．我

不再定期看到他，但他不时来办公室看看我。

excel in . excel at . be very good at 优于；擅长

He excelled at tennis as a young boy．他在少年时就擅长网球。

David excels in history．戴维的历史成绩最好。

 except for . if…be exclude；with the exception of 除去…以外

Your composition is good，except for some spelling mistakes．你的作文写得不错，只是有几处拼写错误。

This translation is very well done，except for a few inaccuracies．这篇译文很不错，只有几处译得还不够确切。

exchange for . give one thing and receive another thing for it 交换

I'd like to exchange this dress for one of a larger size.我想把这件衣服换成一件尺寸大点儿的。

exclusive of . not including不包括在内

The ship had a crew of fifty-seven，exclusive of officers．这船上有 57名水手，高级船员除外。

The book costs two pounds，exclusive of postage．除邮资以外，这本书价值两英镑。

 excuse for . forgive somebody for因…而原谅（某人）

You will excuse me for not recognizing you at once.请原谅我没有一下子把你认出来。

excuse from . make free from 免除

He had been excused from military service on account of shortsightedness．他因近视而免服兵役。

exempt from . make free from免除

Old age pensioners should be exempt from taxation．领取养老金的人应免除征税。

Being very small can exempt a man from military service. 年岁很小可以免除服兵役。

expect of . anticipate期待；希望

The whole family expects great things of him．全家人对他抱以很大期望。

Parents usually expect too much of their children．父母往往都对子女寄予太多希望。

expose to . leave uncovered or unprotected 暴露于

Do not expose it to the sun．此物谨防日晒。

To stay warm in cold weather，coldblooded animals must expose themselves to a source of warmth such as direct sunlight．冷血动物在寒冷的气温下要保暖，必须把自己暴露在阳光这样的温源下。

expose to . make known揭露（出来）

We must expose this shameful activity to the newspaper．我们必须将这可耻勾当公诸报端。

expressive of . serving to express 表示的；表现的

His look was expressive of gratitude．他流露出感激之情。

A baby's cry may be expressive of hunger or pain．婴儿的哭啼可能表示饥饿或疼痛。

fa11 away . diminish；decline 减少； 衰落；减弱

The wind fell away and all was calm．风变小了，周围一片寂静。

The number of people coming to the club has fallen away a lot．来俱乐部的人数大大减少了。

Attendances are falling away steadily．出勤率在逐渐下降。

fa11 away .go away；vanish离开；消失

All his old friends fell away from him．老朋友们都疏远了他。

The old customs have fallen away into disuse．这些旧风俗已经废弃了。

fa11 away .fall out and down；drop away 脱落；落掉

Flowers are falling away．花在凋谢。

The stones have fallen away from the side of the house．房子侧面的石头脱落了。

fa11 away .decay；betray 变质；背叛

A true revolutionary should never fall away in time of danger．一个真正的革命者在危急时刻绝不应该背叛。

Meat is kept from falling away in cold storage．肉放进冷藏库以防变质。

fall back  . move back;retreat返回；撤回

He fell back in surprise．他被吓得往后退缩。

Badly beaten，the enemy had to fall back in disorder．敌军被打得一败涂地，乱成一团向后撤退。

As the enemy advanced，we fell back．敌人进攻时我们就后退。

The audience fell back into silence．观众又静了下来。

fall back on . fall back upon . rely on；turn to somebody for help依赖；求助于

Doctors sometimes fall back on old cures when modern medicine does not work．当现代药物不管用时，医生有时依靠古老的医疗方法。

It's good to have a friend to fall back on.有个可依靠的朋友是很好的。

When the big bills for his wife's hospital care came，he was glad he had money in the bank to fall back on．当他收到妻子的一大笔住院费的帐单时，他因为银行里有一笔钱而感到欣慰。

We can always fall back upon Bill when we are in difficulties if we can't get anyone else．遇到困难时，如果找不到别人，我们随时都可以求助于比尔。

fall back on . fall back upon . go back to回过来再谈；重提

You must fall back on what you said at the meeting．你必须回过来把会上讲的再说一遍。