/ˈɡriː.vəns/
something that you think is unfair and that you complain or protest about 不平的事；委屈；抱怨；牢骚
Parents were invited to air their grievances (= express them) at the meeting.
家长们应邀在会上诉说他们的苦衷。
He had been nursing a grievance against his boss for months.
他几个月来一直对老板心怀不满。
Does the company have a formal grievance procedure (= a way of telling sb your complaints at work)?
公司有正式投诉程序吗？