4 sentences

1. 他总是喜欢讲一些低级的笑话。

   tā zǒng​shì xǐ​huan jiǎng yī​xiē dī​jí de xiào​hua.

   He always likes to tell tasteless jokes.

   Source: Dong Chinese Dictionary

2. 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

3. 这种低级的谎言，只能用来愚人而已。

   zhè zhǒng dī​jí de huǎng​yán, zhǐ néng yòng​lái yú​rén ér​yǐ.

   Such low-level lies can only fool simpletons.

   Source: Dong Chinese Dictionary

4. 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