1.“侵蚀；腐蚀；逐渐破坏；风化”的三种不同表达方式

（1）eat away 侵蚀；腐蚀；逐渐破坏

The coastline is being eaten away year by year.

海岸线年复一年地被侵蚀着。

（2）eat away at sth / sb 侵蚀；腐蚀；逐渐破坏

Wood worm had eaten away at the door frame.

木蛀虫将门框一点点蛀坏了。

His constant criticism ate away at her self-confidence.

他不断的批评使她逐渐丧失了自信心。

（3）erode 侵蚀；腐蚀；风化

The cliff face has been steadily eroded by the sea.

峭壁表面逐渐被海水侵蚀。

The rocks have eroded away over time.

这些岩石随着时间的推移逐渐风化了。

2.eat sb alive（辩论、比赛等中）大败某人，完全战胜某人

The defence lawyers are going to eat you alive tomorrow.

辩护律师明天一定会彻底打败你们。

3.“eat up ”的三种不同含义

（1）使沉迷，使焦虑，使纠缠

She was eaten up by regrets.

她后悔不已。

（2）耗费，花费，损耗

Legal costs had eaten up all the savings she had.

诉讼费耗掉了她所有的积蓄。

（3）吃完，吃光

Come on. Eat up your potatoes.

快点儿。把土豆都吃掉。

4.“in the open”的两种不同含义

（1）在户外，在野外，露天

Children need to play out in the open.

孩子需要在户外玩耍。

（2）公开

Government officials do not want these comments in the open.

政府官员不想公开这些评论。

5.“block out ”的两种不同含义

（1）挡住，遮住（光线或声音）

Black clouds blocked out the sun.

乌云遮住了太阳。

（2）忘掉，抹去（不愉快的事）

Over the years she had tried to block out that part of her life.

多年来她努力想把她生命中的那一段经历从记忆中抹去。