重点讲解：
1. in fact 事实上，其实；
例句：Both mushrooms look innocuous but are in fact deadly.
这两种蘑菇看起来似乎都无害，实际上却是致命的6Zo8zIkdtj=n@sk。
2. write up 把…整理成文；详细写出（所做的事或所说的话）；
例句：He wrote up his visit in a report of over 600 pages.
他将自己的访问整理成了一份600多页的报告a^j&,7Re%;。
3. think of 想出，想到；
例句：It's the only explanation I can think of.
这是我能够想到的唯一理由l4!dfb]cxir.OV#q。
4. keep sb. from doing sth. 阻止（或防止、阻碍）…做；
例句：She had not doubted she was going to see them but this did not keep her from being frightened.
她知道她会看到他们，但这还是让她感到恐惧BoL4giM.tZ&0m。