Crack down
严加管制; 严加治理
The police cracked down on drunk driving and speeding.
警察严厉打击酒后驾车和超速行驶。
Crack down on
制裁；镇压
The government is determined to crack down on illegal transaction.
政府决心严厉打击非法交易。
Crack on
继续干下去; 继续
He is cracking on with his new book.
他在继续写他的新书。
Crack up
精神垮掉，崩溃
There's so much going on these days that I think she's cracking up.
这几天发生的事情太多了，我觉得她快崩溃了。
哈哈大笑; 放声大笑
The reality show ‘Back to Field’ really cracked me up.
真人秀节目《向往的生活》真让我大笑不止。
赞美；吹捧
This type of cell phone is not all it’s cracked up to be.
这款手机并没有人们所吹捧的那样好。
撞坏；撞毁
He cracked up his car this morning.
他今天早上把车撞坏了。
Crack into
侵入，非法进入〔别人的计算机系统〕
A hacker cracked into his computer.
一个黑客侵入了他的电脑。
