I complained to the manager and he was very nice about it.

我向经理发牢骚，他很宽容。

《牛津词典》

I complained frequently and loudly.

我不断地大声抱怨。

youdao

"I complained when getting out of the party."

我步出晚会时抱怨道。

youdao

Yeah, I,I,I know a lot of people have complained about that.

是的，我知道很多人对此有所抱怨。

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