burn down . burn completely 把…烧成平地；烧掉

The building was burned down last week．这幢大楼是上周烧毁的。

burn down . 渐渐烧完；燃料燃尽；火力减弱

The fire has burned down；get some more coal please．火不旺了，再添点煤吧。

burn out . destroy by burning 烧掉（家、店、财产等）

The fire burned out his shop and left him deep in debt．火烧掉了他的商店，使他负债累累。

burn out .烧坏（电灯泡、电器）

The electric light bulb is burnt out．电灯泡烧坏了。

There are no lights in the house．Perhaps a fuse has burned out．屋里没灯，可能是保险丝烧坏了。

burn out .die；burn to an end（炉火等）烧尽；燃完

The oil lamp has burned out．煤油灯的油燃尽了。

burn out . 因工作过度等而垮下；精疲力尽

You'll burn yourself out if you go on working at this rate．如果你继续这样干下去的话，你的身体会垮掉的。

burn out .disappear（怒气等）消失

Their anger seems to have burned out．他们的愤怒似乎已经平息。

burn up . burst into flames again；burn brightly 烧起来；旺起来

The fire burned up when she added some wood．她添了一些木柴，火就烧得旺起来了。

burn up .make angry 激怒；使…恼火

His behaviour really burns me up．他的行为真使我恼火。

He was burnt up about the matter．他为这件事大发雷霆。

burn up .burn completely；consume entirely 烧完

The fire burned up a number of valuable manuscripts．那场火烧掉了一批珍贵的手稿。

The house burned up before the firemen got there．消防队员到达前，房子已烧光了。

burst in . break in ；smash in 闯入；破门而入

The police burst in and told everyone to stand still．警察闯了进来，叫大家站着不动。

They had to burst the door in because they had lost the key．他们丢了钥匙，只好破门而入。

burst in .interrupt 打断

Father told his son not to burst in while adults are talking．父亲叫他儿子不要打断大人的谈话。

burst in .appear suddenly 突然出现

He'll be bursting in upon us at any moment．他会随时突然出现在我们面前。

We were talking about him when he burst in．我们正谈到他时，他突然来了。

burst into . enter suddenly；smash into 闯入；破门而入

The police burst into the room．警察突然闯进了房间。

burst into .  begin suddenly 突然开始；突然…起来

The audience burst into applause．观众突然报以热烈的掌声。

Mary burst into laughter．玛丽突然大笑起来。

The sad story made the girl burst into tears．悲惨的故事使那女孩突然哭起来。

burst out . begin doing something suddenly 突然…起来

Everyone was quiet when John suddenly burst out laughing．大家都很安静，突然约翰大笑起来。

Every time she thought about him she burst out crying．每当想起他，她就会突然哭起来。

bury oneself in . give all one's attention to；be lost in 沉湎于；埋头于

You'll have to bury yourself in your studies if you want to pass the entrance examinations．要想通过入学考试，你必须埋头读书。

He busied himself in the garden．他忙着在花园里干活。

bury oneself in .hide in a place 隐居；隐藏

The old poet buried himself in the countryside．老诗人隐居在乡间。

busy with . busy at  busy over . busy working；having much to do忙于干…

He was busy with／over／at his work．他忙着干他的工作。

She was busy day and night with her research work．她日夜忙着做她的研究工作。

but for . without；if it were not for 要不是；如果没有

But for his help，I should not have succeeded．如果没有他的帮助，我是不会成功的。

We should have gone for a spring outing but for the bad weather．要不是天气不好，我们会去春游的。

buy off    bribe 贿赂

The criminal tried to buy off the policemen．那个罪犯试图贿赂警察。

I don't like the way they are trying to buy me off—there must be something suspicious going on．我不喜欢他们这样想方设法买通我，其中定有某种可疑之事。

buy out  ；buy a business from somebody 买下…产权

The bigger company bought out all the shareholders of two smaller ones．这家大公司买下了两家小公司的所有股份。

He can sell his interest in that business any time because Mr．Smith will gladly buy him out．他随时都可以把他在那个公司的股份卖掉，因为史密斯先生很乐意把他的股份买下。

buy over . bribe；win over by paying money收买

He was quite mistaken if he thought he could buy me over．如果他认为他可以收买我，那就大错特错了。

He seems to think he can buy us over very cheaply．他们似乎认为可以轻易地收买我们。