2 sentences

1. 古人常将社会阶层划分为士、农、工、商。

   gǔ​rén cháng jiāng shè​huì jiē​céng huà​fēn wéi shì, nóng, gōng, shāng.

   Ancient people often divided society into four classes: scholars, farmers, artisans, and merchants.

   Source: Dong Chinese Dictionary

2. 贫富差距的扩大导致了社会阶层的严重分化。

   pín​fù chā​jù de kuò​dà dǎo​zhì le shè​huì jiē​céng de yán​zhòng fēn​huà.

   The widening wealth gap has led to a serious polarization of social classes.

   Source: Dong Chinese Dictionary