3 sentences

1. 别在酒里掺水。

   bié zài jiǔ lǐ chān shuǐ.

   Don't dilute the wine with water.

   Source: Dong Chinese Dictionary

2. 这种燃料中掺入了一定比例的甲醇，使用时需要注意安全。

   zhè zhǒng rán​liào zhōng chān rù le yī​dìng bǐ​lì de jiǎ​chún, shǐ​yòng shí xū​yào zhù​yì ān​quán.

   A certain proportion of methanol is mixed into this fuel, so safety precautions must be taken during use.

   Source: Dong Chinese Dictionary

3. 他伸手掺住快要摔倒的同伴，周围的人都松了一口气。

   tā shēn​shǒu shǎn zhù kuài yào shuāi​dǎo de tóng​bàn, zhōu​wéi de rén dōu sōng le yī kǒu qì.

   He reached out to steady his companion who was about to fall, and everyone around breathed a sigh of relief.

   Source: Dong Chinese Dictionary