1. crack on : 继续疾走;
2. crack wise : 说俏皮话;
3. crack up : 撞坏, 衰退;
及物动词
1. His voice cracked with grief.
他的嗓子由于悲伤而变哑了。
2. He wanted to crack the rowdy over the head, but refrained.
他想猛击小流氓的头,可还是忍住了。
不及物动词
1. Her voice cracked with grief.
她悲伤得语不成声。
名词
1. He said he didn't know how to swim but he would take a crack at it.
他说他不会游泳,但将尽力尝试一下。
2. crack
2. There are many cracks in the old wall.
墙上有许多裂缝。