基本释义
相关例句
crack-up
7.Suddenly, without warning the plane seemed to crack up as it was about to take off
8.I kept a straight face as long as I could, but I finally had to crack up.

9.It is really breath-taking and entrancing to see the vast expanses of desert suddenly come to a pause and crack up to reveal hundreds of jagged grottoes carved out of the precipices in a honeycomb pattern with superb and invaluable age-old murals painted on the walls of each grotto!
