crack up的意思？

crack up的音标：crack up的英式发音音标为：[kræk ʌp]crack up的美式发音音标为：[kræk ʌp]...

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...