2 sentences

1. 他夏天常穿一件白色的背心。

   tā xià​tiān cháng chuān yī jiàn bái​sè de bèi​xīn.

   He often wears a white tank top in the summer.

   Source: Dong Chinese Dictionary

2. 大量的汗水已经渗透了他的背心。

   dà​liàng de hàn​shuǐ yǐ​jīng shèn​tòu le tā de bèi​xīn.

   A lot of sweat has soaked through his vest.

   Source: Dong Chinese Dictionary