重点讲解：
1. be aware of 注意到的；察觉到的；意识到的；
Advanced students need to be aware of the importance of collocation.
层次较高的学生必须意识到词语搭配的重要性7uw;cHR6eHz!。
2. get off 免受惩罚；逃脱（严厉的）惩罚；
He is likely to get off with a small fine.
他可能会逃脱严惩，仅仅罚一点钱了事iz8bhua)N@gO,@f91u。
3. keep sb. from sth./doing sth. 阻止（或防止、阻碍）…做；
Embarrassment has kept me from doing all sorts of things.
我总是害怕受窘，什么事都不敢去做u!cHo%NCs3ka。
4. at the same time 同时；
She looked so beautiful, and at the same time so remote.
她相貌如此美丽，同时又如此清高不群Thw[MG~fp|%n。