1.know of 知道有，听说过
例句：Do you know of any other excuses?
你还知道其他的任何借口么？
2.know sth. backwards 对某事物熟得能倒背如流
例句：You've read that book so many times you must know it backwards by now!
那本书你读了很多遍，现在一定能倒背如流了！
3.know the score 了解情况，了解真相，知道(问题的）症结
例句：Delve a little deeper if you really want to know the score.
如果真想知道事情的个中缘由就需要深一层的钻研了。
4.know what one's talking about 确凿有据地讲话
例句：You don't know what you are talking about.
你在胡说八道。
5.lab experiment 实验室试验,暗室实验
例句：A previous study showed that the fish can, in fact, "count"—differentiating between numerical quantities in a lab experiment.
此前一项研究表明，事实上，鱼可以“计数”—与实验室试验的数值有区别。
6.lab hours 实验室开放时间
例句：The FBI also says Ivins worked unusually late lab work hours around the time of the attacks.
FBI还说Ivins在发起攻击时间左右一直在实验室里工作到很晚。