They discovered him stealing public property.是什么意思？

They discovered him stealing public property.

他们发现他偷窃公共财产。

they

pron. 他/她/它们，人们，大家，政府，当局，她们；

例句
The storms had abated by the time they rounded Cape Horn.
他们绕过合恩角时，暴风雨已经减弱。

discovered

v. 发现( discover的过去式和过去分词 )，碰见，撞见，了解到；

例句
He had discovered politics and was rapidly becoming absorbed by it...
他接触到了政治并且迅速地对它着了迷。

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。

stealing

n. 偷窃，贼赃，偷垒；adj. 有偷窃行为的；v. 偷( steal的现在分词 )，悄悄地做，悄悄地走；

例句
She is reduced to stealing to feed her hungry family.
她沦落到要靠偷窃来养活饥饿的家人。

public

adj. 公众的，公共的，公开的，政府的，人人知道的，知名的；n. 大众，社会，公共场所，（文学家等的）爱读者；

例句
The public never had faith in his ability to handle the job...
公众从来不相信他有能力胜任这一职位。

property

n. 财产，房地产，特性，属性；

例句
The property is set in two acres of land.
这座房产占地两英亩。