4 sentences

1. 贫富差距正在逐渐缩小。

   pín​fù chā​jù zhèng​zài zhú​jiàn suō​xiǎo.

   The gap between the rich and the poor is gradually narrowing.

   Source: Dong Chinese Dictionary

2. 我们必须努力缩小贫富差距。

   wǒ​men bì​xū nǔ​lì suō​xiǎo pín​fù chā​jù.

   We must work hard to narrow the gap between the rich and the poor.

   Source: Dong Chinese Dictionary

3. 贫富差距是当今社会面临的一大挑战。

   pín​fù chā​jù shì dāng​jīn shè​huì miàn​lín de yī dà tiǎo​zhàn.

   The gap between the rich and the poor is a major challenge facing today's society.

   Source: Dong Chinese Dictionary

4. 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