"complain" in Chinese (Simplified)
抱怨投诉
Definition
表示你对某事不满意、烦恼或不高兴。它既可以指日常抱怨，也可以指正式说明某件事有问题。
Usage Notes (Chinese (Simplified))
常和 'about' 或 'that' 连用：'complain about the noise'，'complain that it was too loud'。'complain to' 表示向谁抱怨，'complain about' 表示抱怨的问题。如果一个人老是这样说，语气会显得偏负面。
Examples
The guests complained about the cold room.
客人们**抱怨**房间太冷。
He complains when the bus is late.
公交车晚点时，他会**抱怨**。
She went to the manager to complain about the food.
她去找经理**投诉**食物问题。
I’m not trying to complain, but this coffee is barely warm.
我不是想**抱怨**，但这杯咖啡几乎不热。
Customers started to complain that the app kept crashing.
顾客开始**抱怨**，说这个应用总是崩溃。
She never complains, even when she has a lot on her plate.
即使事情很多，她也从不**抱怨**。