名詞 crack up:

1. a mental or physical breakdown
   同義詞：breakdown, crack-up

動詞 crack up:

1. suffer a nervous breakdown
   同義詞：crack, crock up, break up, collapse
2. rhapsodize about
3. laugh unrestrainedly
   同義詞：break up

1. Suddenly, without warning the plane seemed to crack up as it was about to take off.
   飛機將要起飛時，突然，沒有得到任何警告，就好像要撞裂了。
2. Cyril is going to crack up If he doesn't stop working so hard.
   如果西里爾繼續(xù)這樣拼命工作，他會垮下來的。
3. You'll crack up if you go on working so hard.
   你繼續(xù)這樣拚命干下去，身體會吃不消的。
4. He was simply not the genius he was cracked up to be.
   他不象人們所贊揚的那樣是個天才