Serve as = to give service that represents something. I will serve as a butler to their family./ These waffles are serve as …
J.K.Rowling's story may be served as an example of failure-to-success. 一个主动一个被动。 eg：He serves him as a Kingdom.他把 …
(grammar) serving as or indicating the subject of a verb and words identified with the subject of a copular verb. （语法学）用做动词的主语， …
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