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重点讲解：
1. also known as 亦称为；
Drug dependence is one of them, drug dependence, also known as drug addiction, is a strong desire for the drug.
药物依赖属于其中的一种，药物依赖又称药瘾，是指对药物强烈的渴求。
2. serve as 用作；可当…使用；充作；
He served as a captain in the army.
他曾是一名陆军上尉。
3. make of 理解；看待；
I just wonder what you make of all that.
我只是纳闷儿你是怎么看待这一切的。
4. give rise to 引起；使发生；
The novel's success gave rise to a number of sequels.
这部小说的成功带来了一系列的续篇。
