complain /kəm'pleɪn/ v. 抱怨；埋怨；发牢骚

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例句/词组:

I'm going to complain to the manager about this.

我要就这件事向经理投诉。

英语解释：

to say that you are annoyed, unhappy or not satisfied about sb / sth 抱怨；埋怨；发牢骚