2 sentences for 脑子 (nǎo​zi — brains)

1. 你脑子里长了个小肿瘤。

   nǐ nǎo​zi lǐ zhǎng le gè xiǎo zhǒng​liú.

   You have a small tumor in your brain.

   Source: OpenSubtitles

2. 这道菜是用猪脑子做的。

   zhè dào cài shì yòng zhū nǎo​zi zuò de.

   This dish is made with pig brains.

   Source: Dong Chinese Dictionary