3 sentences for 腦 (nǎo — brain)

1. 脑是人体的指挥中心。

   nǎo shì rén​tǐ de zhǐ​huī zhōng​xīn.

   The brain is the command center of the human body.

   Source: Dong Chinese Dictionary

2. 你需要用上所有的脑细胞。

   nǐ xū​yào yòng shàng suǒ​yǒu de nǎo xì​bāo.

   You need all the brain cells you've got.

   Source: OpenSubtitles

3. 过度用脑后，他感觉死了很多脑细胞。

   guò​dù yòng nǎo hòu, tā gǎn​jué sǐ le hěn​duō nǎo​xì​bāo.

   After overusing his brain, he felt as if he had lost many brain cells.

   Source: Dong Chinese Dictionary