1. be supposed to do 应该做某事
例句：
Am I supposed to clean all the rooms or just this one?
我应该打扫所有的房间，还是就这一间？
2. beg your pardon 对不起；请再说一次
例句：
What's wrong with my mom? I beg your pardon?
我妈妈怎么了？能再说一遍吗？
3. non-smoking section 无烟区，禁烟区
例句：
Now there is a seat available in non-smoking section.
现在无烟区有空位了。
4. a heavy smoker 烟瘾很大的人
例句：
He used to be a heavy smoker but now he has given up smoking.
他以前抽烟很厉害，但现在已经戒了。
5. refrain from doing sth 克制；抑制；忍住
例句：
If you can refrain from paying attention to your fears and anxieties, nobody will know about them.
如果你能克制住不去注意恐惧和焦虑，那么没人会察觉到它们的。
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