重點講解：
1. what's up
口語常用，出什么事啦？出什么問題啦？出什么毛病啦？
eg. Then the crowd disperses all of a sudden and I don't know what's up.
然后人群突然散開，我不知道發生了什么事情。
eg. You look pale, what's up?
你臉色蒼白，出什么事了？
2. deal with
處理；應付；與…打交道；
eg. Moody people are very difficult to deal with.
喜怒無常的人很難打交道。
eg. I have a matter of importance to deal with.
我有要事要處理。
3. lay dow
不露面；不引起注意；保持低調；
eg. 'm going to try to get to Texas and lay low there.
我如今得設法趕到得克薩斯去，在那里藏起來。
eg. The escaped prisoners lay low in the wood, until the police had moved away.
逃犯們躲在樹林里，直到警察走開后才出來。