重点讲解：
1. tell sb. to do sth.
叫；命令；吩咐；建议某人做某事；
eg. A passer-by told the driver to move his car so that it was not causing an obstruction.
一个过路人叫那个司机把他的车挪一挪，免得挡道。
eg. She told me on the telephone to come help clean the house.
她在电话里叫我过去帮忙打扫屋子。
2. refer to
谈及；提到；提及；涉及；称…（为）；
eg. He simply referred to him as Ronnie.
他就叫他龙尼。
eg. Marcia had referred to him as a dear friend.
马西娅把他称作好朋友。
eg. n his speech, he referred to a recent trip to Canada.
他在讲演中提到了前不久的加拿大之行。
3. get straight
把…弄清楚；明确；
eg. You need to get your facts straight.
你需要讲清楚你的情况。
eg. There's a lot of things we've got to get straight.
有许多事情我们需要搞清楚。