重点讲解：
1. be sth. to do with sth.
与…有关；关于；
eg. They were shouting at each other. It was something to do with money.
他们在吵架，是为了钱的事[JO;G|fZ]#d]LDXc@t。
eg. My new job is something to do with marketing.
我的新工作和市场营销有关iYB^ZQ7H7VC。
2. knock out
使不省人事；使入睡；
eg. He was knocked out by a single blow to the head.
他头上只被打了一下便昏过去了P4F[Dclqgv)pDlsL。
eg. The police was hit on the head and knocked out.
警察头部被击，晕倒了tM840D_(Nu4AFI2V。
3. laugh at
嘲笑；讥笑；
eg. Don't laugh at unfortunate people.
不要嘲笑不幸的人0ksSd.)Rh&Df,O。
eg. They laughed at my puny efforts at rock-climbing.
他们取笑我在攀岩活动中的那可怜劲儿PQ@2cx&]rN5。