crack up造句

1、You'll crack up if you carry on working like this.
你再这样干下去，身体会垮掉的。

2、Slot your foot into the crack up to the arch of your foot, keeping your knee out to the side.
把你的脚尖（大脚趾在上，小指在下）楔入裂缝中去，直到你的足弓的部分，膝盖保持向外。

3、Suddenly without warning the plane seemed to crack up as it was about to take off.
飞机将要起飞时，突然，没有得到任何警告，就好像要撞裂了。