- 使…噼啪作响：
The driver cracked the whip above the horse's head.
车夫把鞭子在马头上方挥舞得噼啪作响。
- 使裂开：
The boiling water cracked the glass.
开水把玻璃杯弄裂了。
- 撞击，打击并发出剧烈声响：
The boy fell and cracked his head against the wall.
男孩跌倒了，脑袋砰地一声撞到墙上。
- [美国俚语]闯进，破门而入
- 破坏，损坏，突然打断；削弱：
The new evidence against him cracked his composure.
新的不利于他的证据使他沉不住气了。
- 稍微打开：
She cracked the window to let in fresh air.
她稍微打开了一点窗户，让新鲜空气进入室内。
- 说，讲(笑话等)：
They sat down around the stove, smoking and cracking jokes.
他们坐在火炉周围，边吸烟边说笑话。
- 解决；辨认暗号，破译；破案；揭开(秘密等)：
The police cracked a murder case last week.
警察上周侦破了一件凶杀案。
- 使(声音)发哑
- [口语]撬开，打开(保险柜等)，翻开(书本阅读)；打开(酒瓶喝酒)：
to crack a bottle
打开酒瓶喝酒
The burglars broke into our office and cracked the safe last night.
昨夜盗贼闯入我们的办公室并撬开了保险柜。
- 【化学】裂化(石油等)，使裂解：
Inside the reactor the large molecules are cracked into smaller molecules.
在反应堆内部大的分子被裂解为较小的分子。
- 吹捧(某人或物)：
The shirt wasn't all the salesclerk cracked it up to be.
这件衬衫并不全像售货员所吹嘘的那么好。
- 使发狂，使精神失常
- 【棒球】打击
- 【计算机】非法侵入：
With technical details of the security system already circulating on the Internet, instructions for cracking it will almost certainly make their way into the computer underground.
由于保安系统的技术资料已在因特网上流传，如何侵入该系统的指令也当然会流入非法人员所用的计算机中。