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重点讲解：
1. grow up 长大成人；成熟；
Children grow up so fast these days.
如今孩子们长得真快。
2. all sorts of 各种各样的；形形色色的；
The new approach had wide applicability to all sorts of different problems.
新方法广泛适用于解决各种各样的问题。
3. in the first place 起初；一开始；
I should never have taken that job in the first place.
我当初就不该接受那份工作。
4. at night 晚间；晚上；
These animals only come out at night.
这些动物只在夜晚出来。
n. （单复同）物种，种类
