4 sentences

1. 这两个人素不相识。

   zhè liǎng gè rén sù bù​xiāng​shí.

   These two people are total strangers to each other.

   Source: Dong Chinese Dictionary

2. 我不吃肉，只吃素。

   wǒ bù chī ròu, zhǐ chī sù.

   I don't eat meat; I only eat vegetarian food.

   Source: Dong Chinese Dictionary

3. 环境是影响胎儿发育的重要因素。

   huán​jìng shì yǐng​xiǎng tāi'ér fā​yù de zhòng​yào yīn sù.

   Environment is an important factor affecting fetal development.

   Source: Dong Chinese Dictionary

4. 我比较喜欢穿颜色素一点的衣服。

   wǒ bǐ​jiào xǐ​huan chuān yán​sè sù yī​diǎn de yī​fu.

   I prefer wearing clothes in more plain colors.

   Source: Dong Chinese Dictionary