a gram of crack中的crack是什么意思

crack a crack在这里是什么意思? crack a bottle里的 crack the crack the 是介绍古代历史中的 There is a crack in everything There came a crack of thunder,____ a flash of lighting. After a f____ of lighting,there comes a loud crack of thunde 英语翻译Some people can spring out of bed at the crack of dawn a 英语翻译i couldn't give the furry crack of a rat's behind.生活大爆炸中 I'm only a crack in this Castle of Glass,hardly anything els 英语翻译i take a pint of whiskeyand crack open it's lidi drink t