steal away . leave quietly and often secretly溜掉

He stole away while everyone else was watching the film．别人都在全神贯注看电影时，他悄悄溜走了。

The enemy stole away under cover of night．敌人趁夜黑逃遁。

Time stole away．时间不知不觉地过去了。

 steal into . walk into quietly and secretly偷偷进入

He stole into the room while I was writing a letter．我写信时，他悄悄地进了房间。

The thief stealthily stole into the house．小偷悄悄地潜入房子。

steal off . leave silently and secretly偷偷走开

Jim stole off without anyone seeing him．吉姆偷偷地走开了，谁也没看见。

 steal over . slowly and quietly take hold of不知不觉地袭来；悄悄地呈现

A feeling of happiness stole over the girl when she thought about the days ahead．当女孩想到未来的日子时，脸上不禁露出了一种幸福感。

A smile stole over his face．他脸上隐隐现出笑容。

Mist stole over the valley．雾渐渐弥漫了整个山谷。

steal somebody 's thunder . do or say something that somebody has planned to do or say先人一着

John announced the news before Peter had a chance，stealing his thunder．约翰在彼得之前宣布了那则消息，抢了个先。

He stole his opponent's thunder by proposing a toast for the distinguished visitor．他抢在对手之前向贵宾祝酒。

steal the show . steal the spotlight . attract attention away from somebody or something that people should be watching抢镜头；引起注意力

She was on the stage for only a few minutes，but I thought she stole the show．她仅出场几分钟，不过我认为她抢先出了风头。

Just as the speaker began，a little dog ran up the aisle，and stole the spotlight from him．正当演说者开始演说时，一只小狗跑上通道，把人们的注意力吸引了过去。

 steal up on . approach somebody slowly and quietly悄悄地走近；偷袭

Her friend stole up on her and made her jump．她的朋友悄悄走近她，使她跳了起来。

A small party stole up on the bridge under cover of darkness．一支小分队趁黑夜偷袭这座桥。

steam up . cover or become covered with steam 有蒸汽蒙住或凝结

The rain steamed up his glasses and he could hardly see．雨水蒙住了他的眼镜，因此他几乎什么也看不见。

The windows have steamed up．窗户上凝结了水汽。

steam up . make angry or excited使激动

He's all steamed up about losing the contract．他因合同吃了亏而大发雷霆。

Bill was all steamed up about the movie had just seen．比尔对他刚看的电影感到非常激动。

steer clear of . steer a safe distance from；go around without touching绕开；躲避

Don't steer clear of us；nobody is going to hurt you．不要躲着我们，没人会伤害你的。

A ship steers clear of a rocky shore in stormy weather．船在暴风雨中绕开多岩石的海岸。

You would be better to steer clear of so much jargon in your talk．你的讲话里要是少用些专门术语就会更好。

stem from . be traceable to or caused by somebody or something 来自；由…产生

Their hatred of him stemmed from fear．由于恐惧他们对他产生了仇恨。

This idiom stems from an ancient Greek fable．这个成语源自一则古代希腊寓言。

step aside . move to one side让到一边

Would you mind stepping aside to let this old lady off the bus? 请让一让，让这位老太太下车好吗?

Step aside and make room for us．靠边，给我们腾个地方。

step aside . move from a position of authority让位

They expect him to step aside and make way for a younger man．他们希望他让位，好给一个年轻些的人接班。

He was willing to step aside in favor of a more dynamic leader．他愿意让位给更强有力的领导人。

step back . yield ground by moving to the rear；recede后退

He stepped back to admire the painting．他退了几步来欣赏这幅画。

We stepped back politely to let the ladies pass．我们礼貌地后退，让女士们过去。

step back . move backwards from surprise，shock，由于吃惊而后退

When he saw it，he stepped back in surprise．他一看到它，就吃惊得往后退。

She stepped back，hardly able to believe her ears．她吃惊地往后退缩，简直不能相信自己的耳朵。

step by step . gradually逐步地

Step by step I'll learn to do the work．我将逐步地学会干这项工作。

A foreign language can't be learned rapidly；it must be learned step by step．学外语不能急，只能按部就班地学。

step down . walk down走下来

As soon as the train stopped，the conductor stepped down to help the passengers off．火车一停，列车员就下火车帮乘客下车。

step down .  move to a lower level；retire or leave a top position降低；辞职；让位

I've spent so many years as chairman that I feel it is time I stepped down．我当了这么多年的董事长，现在我觉得该退下来了。

Next May our company's president will step down，and we will have to elect a new one at the next stock holders'meeting．明年五月我们公司的总经理任职期满就要退下来了，我们将要在下一次的股东会议上选举一个新的总经理。

step down . slow down放慢

For lack of raw materials they had stepped down production．由于原料缺乏，他们不得不放慢生产进度。

step in . walk in走进

Would you mind stepping in for a moment? 进来坐一会好吗?

The clerk stepped in and asked for Mr．Black．办事员走进来要找布莱克先生。

step in . intervene either to help or hinder插进来（帮助或阻止）；干预

If the government does not step in，there will be no trains on Monday．政府要是不干预的话，星期一将没有任何火车。

The police are reluctant to step in．警察不愿插手干预。

Father stepped in and forbade me to go camping．父亲进来干预不准我去野营。