cash in on.   take advantage of .  profit from 趁机利用；靠…赚钱

Let's cash in on the fine autumn day and go into the country．我们利用这个晴朗的秋日，到乡间去玩玩吧。

You shouldn't try to cash in on the fact that he likes you．你不该利用他喜欢你这一点找便宜。

This big oil company attempted to cash in on the energy crisis．这家大石油公司企图从能源危机中发财。

cast about for .  search anxiously about 急于寻求

The prisoner is casting about for a way of escape．那个囚徒正急着找逃路。

cast aside  . discard；throw away 置…而不顾；抛弃；去掉

You can't just cast people aside like old clothes．你不能象抛弃旧衣服那样扔下别人不管。

Cast aside all illusions and go into the battle．丢掉幻想，投入战斗。

cast away  . throw away 丢掉

They cast away the equipment they would not need．他们扔掉了他们不再需要的设备。

He cast away an advantage．他失去了优势。

cast away  . wreck   （船）遇难；使（船）失事（常用被动语态）

The new ship was cast away during the storm．这条新船在暴风雨中沉没。

A good many ships have been cast away in the Arctic Ocean．在北冰洋，曾有许多船只失事。

cast back  . look back；direct to the past 回顾；回忆

We cast back to our working together on the army farm in the Northeast．我们回忆起我们一道在东北军垦农场劳动的情景。

He cast back his mind to the earlier days．他回忆起先前的日子。

They cast their thoughts back to happier times．他们回想起较为快乐的日子。

cast down  . demoralize；discourage；be lower in spirits 沮丧；泄气；气馁（常用于被动结构或作表语）

The proud will be cast down．骄者必败。

In making scientific experiments，we should not be cast down by temporary setbacks．进行科学实验时，我们不要因暂时挫折而垂头丧气。

She was cast down at the news of her aunt's death．听到她姑妈去世的消息，她情绪很低。

cast down  . throw down；lower 放低；使放下

She cast her eyes down shyly．她羞怯地垂下目光。

cast out  . drive out；expel 赶出；逐出

The members of the association did not like his behaviour，so they cast him out．协会会员们不喜欢他的行为，所以就把他开除了。

He was cast out from our country．他被驱逐出我们国家。

Having repeatedly broken the rules of the game，they were both cast out from the football club．他们两人踢足球时经常犯规，已被开除出足球俱乐部。

cast up . add up,；calculate 加起来；计算

The accounts have to be cast up at the end of each day．每天工作结束时，必须结账。

He tried to cast up the whole complicated thing．他尽力盘算这件复杂的事情。

cast up . refer to constantly in reproach . 一再埋怨地提起；以责备的口吻常常提起

She's been casting that up at me all the time．她为了那件事老是埋怨我。

He always casts up at her the fact that she crashed the car．他总是责备她弄坏了汽车。

catch a glimpse of .get a glimpse of .get a quick view of 瞥见

He ran past the window and caught a glimpse of Mary standing by the door．他从窗外跑过去，瞥见玛丽在门旁站着。

catch at . try to hold or use 试图抓住

A businessman will catch any chance of making a profit．经商的人会抓住任何赚钱的机会。

catch cold . be sick with a cold 感冒

She caught cold and had a severe headache．她感冒了，头痛得厉害。

catch fire  . start to burn 燃烧

Dry grass catches fire easily．干草容易着火。

catch on . become popular；be done or used by many people 流行；受欢迎；被很多人接受

This novel caught on well．这本小说深受欢迎。

It's a nice tune and will catch on quickly．这首曲子很好，不久就会流行开来。

If only the idea could catch on，we should be able to make quite a lot of money out of it ．但愿这个主意被采纳，那么我们就能从中赚一大笔钱。

catch on . finally understand；grasp the point of . 理解；明白；领会

After two hours of trying to learn the new game，he caught on．这种游戏，他学了两小时才明白是怎么回事。

He didn't catch on to what you had implied．他没有理解你话中隐含的意思。

The lady repeated her question several times but I still couldn't catch on．那位女士把她的问题重复了好几遍，但是我还是没听懂。

catch on . fasten accidentally on；catch；grab 挂住；抓住

My coat caught on a mail and tore．我的上衣挂住了一根钉子，撕破

The girl kept catching on to her mother's hand．这个小女孩一直抓住她妈妈的手。

catch one's breath .  因恐惧或兴奋而屏住呼吸；喘气以恢复正常呼吸

The story is full of surprises which cause the reader to catch his breath．这个故事充满了惊险情节，使读者紧张得透不过气来。

After running to the bus stop we sat down to catch our breath．我们跑到车站后坐下来喘气。

catch one's breath .  relax for a moment 放松一下

After a day's work they sat down over tea to catch their breath．工作一天后，他们坐下来喝茶放松一下。