The pettiness of their criticisms enraged him.是什么意思？

The pettiness of their criticisms enraged him.

他们鸡毛蒜皮地挑剔,他十分气愤.

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

pettiness

n. 琐碎，小气，卑鄙；

例句
The pettiness of their criticisms enraged him.
他们鸡毛蒜皮地挑剔,他十分气愤.

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

their

pron. 他（她，它）们的，在提及性别不详的人时，用以代替 him 或 her；

例句
Their permissiveness toward their children reflects the wild abandon of their own lives.
他们对孩子的放任折射出他们自身生活的放浪形骸。

criticisms

n. 批评( criticism的名词复数 )，批判，评论，评论文章；

例句
The criticisms will not stop people flocking to see the film...
批评的声音不会阻止人们涌到影院观看这部电影。

enraged

v. 使暴怒( enrage的过去式和过去分词 )，歜，激愤；

例句
He was enraged by news of plans to demolish the pub...
看到计划拆除酒馆的新闻，他非常愤怒。

him

pron. (he的宾格)他；

例句
They said goodbye to him as he got aboard the train at Union Station.
当他在联合火车站登上火车之际，他们向他道别。