2 sentences for 低级 (dī​jí — elementary)

1. 这种低级生物的结构非常简单。

   zhè zhǒng dī​jí shēng​wù de jié​gòu fēi​cháng jiǎn​dān.

   The structure of this primitive organism is very simple.

   Source: Dong Chinese Dictionary

2. 这种低级错误竟然发生在他身上，真是太可笑了。

   zhè zhǒng dī​jí cuò​wù jìng​rán fā​shēng zài tā shēn​shang, zhēn shì tài kě​xiào le.

   It's ridiculous that such a basic mistake happened to him.

   Source: Dong Chinese Dictionary