He became increasingly dissatisfied and querulous in his old age.

到了晚年 他愈感不满 满腹牢骚

A querulous male voice said, "Look, are you going to order, or what?"

一个爱发牢骚的男声说：“看吧，我们到底是要订购，还是怎样？”

One gets unsettled, depressed, and inclined to be querulous.

人会变得心绪不宁，情绪低落，容易发牢骚。

He was not one who was inclined to be querulous.

他并不是爱吹毛求疵的人。

He had found the old lady depressed and querulous.

他发现老夫人意气消沉，牢骚满腹。

The querulous old man refused to be put on the shelf.

那个爱抱怨的老人不肯让人撇在一边。