3 sentences

1. 宇宙中存在着数十亿个黑洞。

   yǔ​zhòu zhōng cún​zài zhe shù​shí​yì gè hēi​dòng.

   There are billions of black holes in the universe.

   Source: OpenSubtitles

2. 地球上生存着数百万种生物。

   dì​qiú shàng shēng​cún zhe shù bǎi​wàn zhǒng shēng​wù.

   Millions of species of organisms live on Earth.

   Source: Dong Chinese Dictionary

3. 这个自然保护区栖息着数百种鸟类。

   zhè​gè zì​rán bǎo​hù​qū qī​xī zhe shù​bǎi zhǒng niǎo​lèi.

   Hundreds of bird species inhabit this nature reserve.

   Source: Dong Chinese Dictionary