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= Humans on Mars will have to wear special boots (in order to) prevent this.
= Humans on Mars will have to wear special boots (so as to) prevent this.
即：so as to do sth = in order to do sth = to do sth,可在句中充当目的状语.
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To prevent this,humans on mars will have to wear special boots同义句
To prevent this,humans on mars will have to wear special boots同义句
humans on
mars will have to wear
special boots —— —— —— prevent this
humans on
mars will have to wear
special boots —— —— —— prevent this
英语人气：869 ℃时间：2019-11-09 16:53:42
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