1 sentence

1. 沙漠里各种动植物构成了一个脆弱的生态系统。

   shā​mò lǐ gè zhǒng dòng​zhí​wù gòu​chéng le yī gè cuì​ruò de shēng​tài​xì​tǒng.

   The various plants and animals in the desert constitute a fragile ecosystem.

   Source: Dong Chinese Dictionary