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重点讲解：
1. as to 至于…；
There's some question as to whether he will sign this resolution.
他是否会签署这项决议还不能确定。
2. be aware of 注意到的；察觉到的；意识到的；
I don't think people are really aware of just how much it costs.
我认为人们并不真正明白这要花多少钱。
3. look at （尤指专家）检查，察看；
You run the software, you look at the output, you make modifications.
运行该软件，查看输出结果并进行修正。
4. all types of 各种各样；
She mixes with all types of people.
她和各种类型的人打交道。
