动词 expose的意义之一为:to cause (someone) to experience something or to be influenced or affected by something — + to
He wants to expose his students to great works of literature.
The workers were exposed to dangerous chemicals.
以上例句表明,expose sb to sth不仅表示暴露于有害环境,还可以表示使某人体验某事(如第一个例句)
名词exposure的释义之一为: the condition of being exposed to something
所以,名词exposure to也不限于表示暴露于有害的环境中,还可以表示体验某事。
exposure to different cultures 就是体验不同文化,这种用法是没有任何问题的。
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