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1、1,意思上的区别,complain of 多了to say that you have a pain or are sick的意思,比如：She had been complaining of headaches.另外complain of的抱怨是正式的,所以可以是法律上,向官方提出的.比如：Refugees had complained of being robbed and beaten by officials.2.用法上的区别 complain of / complain about 是接 sth或者动名词 但是complain about 可以不带,而complain of则不行.比如：What are you complaining about?。

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