牢骚的英文：
discontent
complaint

参考例句：

He wouldn't listen to my beef against his subordinates.
他不愿听我对他下属所发的牢骚。

To dissipate one’s griefs extensively
大发牢骚

Grumble;complaint
怨言;牢骚.

in a grouch about the long line for tickets.
对排长队买票大发牢骚

What's your beef this time?
这次你的牢骚是什么?

He squawked about his food.
他对他的饮食大发牢骚。

They do not sweat and whine about their condition.
它们并不对它们的处境牢骚烦恼。

I had to listen to a long recital of all his complaints.
我得听他那些没完没了的牢骚.

He likes to have a good gripe from time to time.
他时常爱发上一通牢骚.

We made a bit of a fuss in a roundabout way.
我们拐弯抹角地发了点牢骚。

discontent是什么意思：
n. 不满，不满的缘由，不愉快；不满的人
adj. 不满的；不安分的；不快的
v. 使不满意；使不快

Discontent is the first step in progress.
不满足是进步的第一步。

The customer is discontent with the service.
顾客对服务不满意。

The audience buzzed with discontent.
观众因不满而嗡嗡地说话。

The official corruption discontented the people.
官员腐败令人民不满。

The workers were smouldering with discontent.
劳工郁积着不满情绪。

complaint是什么意思：
n. 抱怨；抗议；控告

Viewers jammed the switchboard with complaints.
打电话投诉的观众是总机应接不暇。

I recounted Egyptian complaints.
我重述了一下埃及方面的不满意见。

He was irritated by their perpetual complaints.
他们不断发牢骚把他惹火了。

Students made a rash of complaints.
学生们发出一片抱怨声。

To relay any customer complaints to supervis.
处理并向主管汇报客人的投诉。