There's been a record number of complaints about the standard of service.

对服务水准投诉的数量创了新高。

People have been reluctant to make formal complaints to the police.

人们一直不愿向警方正式投诉。

My main complaint is that we can't go out on the racecourse anymore.

我抱怨的主要缘由是我们无法再去外面的赛道了。

Eczema is a common skin complaint which often runs in families.

湿疹是一种常见的皮肤病，通常具有遗传性。