n.分裂；分解
adj.很快的；很好的；很美的
adv.很快地；很好地；很美地
It is known as catalytic cracking. 这就是所谓的催化裂化。
That was a cracking shot he played. 他这一下打得妙极了。
n.俏皮话
n.撬窃保险箱的行为(或技术)
n.加氢裂化
