3 sentences

1. 欢迎来到食物链的最底层。

   huān​yíng lái​dào shí​wù​liàn de zuì dǐ​céng.

   Welcome to the bottom of the food chain.

   Source: OpenSubtitles

2. 食物链维持了生态系统的平衡。

   shí​wù​liàn wéi​chí le shēng​tài xì​tǒng de píng​héng.

   The food chain maintains the balance of the ecosystem.

   Source: Dong Chinese Dictionary

3. 在食物链中，绿色植物是主要的生产者。

   zài shí​wù​liàn zhōng, lǜ​sè zhí​wù shì zhǔ​yào de shēng​chǎn​zhě.

   In the food chain, green plants are the primary producers.

   Source: Dong Chinese Dictionary