例句：

　　Once destroyed, brain cells do not regenerate.

　　腦細胞一旦遭到破壞，就不能再生。

　　There is a small risk of brain damage from the procedure

　　該手術(shù)有導致腦損傷的輕微風(fēng)險。

　　She is best known for her work on the human brain.

　　她在對人腦的研究方面最為知名。

　　Its brain is small in relation to its body.

　　和它的身體相比，它的大腦很小。

　　It is now possible to map the different functions of the brain.

　　現在已有可能了解大腦的各種功能。