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1.in order to 为了；以便
例句:In order to make it safe, the element is electrically insulated.
为安全起见，该元件作了电绝缘处理。
2.mass destruction 大规模杀伤性；杀伤力
例句:Now they lead in the manufacture of weapons of mass destruction.
现在他们在制造大规模杀人武器方面领先。
3.thousands of 数千
例句:I must have driven past that place thousands of times.
我得有上千次开车经过那里。
4.base on 以…为基础；以…为根据
例句:There was no strong organizational base on which to build.
缺乏一个坚实的组织基础。
