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重点讲解：
1. such as 例如；比如；
Trees such as spruce, pine and oak have been planted.
种植了云杉、松树和橡树等树木。
2. set up 建立；创立；
They set up a working party to look into the issue.
他们设立了一个特别工作组来调查这个问题。
3. more than 多于；超过；
He has been mugged more than once.
他已是不止一次被抢劫了。
4. different from 不同于；与……不同；
Now it is different from the past.
现在和过去不同了。
