重点讲解：
1. ever since
自从；打…以后一直；
eg. He's been there ever since you left!
自从你离开后他就一直在那里！
eg. Ever since we moved last year, I worry a lot about whether I can handle this new job.
自从去年我们搬家，我就一直非常担心能否做好这份新工作。
2. in terms of
在…方面；从…角度看；根据…来说；
eg. It was a bad year for films, in terms of both quantity and quality.
今年的电影无论从数量上还是质量上都说不上好。
eg. It is difficult to express it in terms of science.
要用科学的字眼来表达它是很困难的。
3. know of
听说过；略有耳闻；
eg. We know of the incident but have no further details.
我们听说过这件事，但对详情不是很清楚。
eg. I know of the man, but I've never spoken to him.
我知道这个人，不过从来没有和他说过话。
