crack up

英 [kræk ʌp]

美 [kræk ʌp]

（因精神压力大而）垮掉，崩溃; （使）大笑

柯林斯词典

PHRASAL VERB (因精神压力大而)垮掉，崩溃
If someonecracks up, they are under such a lot of emotional strain that they become mentally ill.
1. She would have cracked up if she hadn't allowed herself some fun.
  她若是没给自己找点乐趣的话，早就崩溃了。
PHRASAL VERB (使)大笑
If youcrack upor if someone or somethingcracksyouup, you laugh a lot.
1. She told stories that cracked me up and I swore to write them down so you could enjoy them too...
  她讲了几个令我捧腹大笑的故事，我一定要写下来，好让你也乐乐。
2. We all just cracked up laughing.
  我们都不禁哈哈大笑起来。

verb

If he doesn't rest he'll crack up soon.
他要是不休息，他很快会垮掉的。
I'd crack up if there wasn't someone I could talk to.
如果找不到人谈谈心我会得神经病的。
They won't crack up, no matter what you do.
哎呀，我知道了，无论你做什么，他都不会有反映的。
Pressure of work caused John to crack up.
工作压力使约翰身体垮了。
She told stories that cracked me up and I swore to write them down so you could enjoy them too
她讲了几个令我捧腹大笑的故事，我一定要写下来，好让你也乐乐。
But there was this perfect crack all the way up to the top.
那儿一条岩缝刚好一直延伸到山顶。
Family problems made him crack up.
家庭问题弄得他精神崩溃了。
Analysis of crack in the up slab of a building basement
某办公大楼地下室顶板裂缝分析
After normalized water storage of the reservoir, the bank slope's stress field changed farther and impelled the tension crack expanding further up and down, but the outward development trend was weakened.
库区正常蓄水后，岸坡应力场进一步发生变化，促使拉裂缝进一步向下、向上发展，但向外发展的趋势减小。
Expression for fatigue crack life is set up which takes energy of plastic deformation for crack propagation as the damage variable.
建立以裂纹扩展塑性变形能为损伤变量的疲劳裂纹寿命表达式。