crack up造句

Pressure of life caused him to crack up.
生活的压力使他身体垮了.

I kept a straight face as long as I could, but I finally had to crack up.
我尽量板着面孔, 但最后还是控制不住失声大笑起来.

If you go on working like this, you'll crack up.
你要是继续这样干下去, 你的身体会垮的.