名词 endorphin:

1. a neurochemical occurring naturally in the brain and having analgesic properties

endn.结束；末端；目标；死亡；部分；终点站；端点；半边球场；剩余物，残余；过世v.终止，结束Enders恩德斯(①姓氏 ②John Franklin, 1897-, 美国细菌学家, 曾获1954年诺贝尔生理学-医学奖)

1. Endorphins serve as powerful pain relievers.
   内啡肽可以作为强效止痛药。
2. The endorphins may react with the blood vessel walls, causing them to widen.
   内啡肽有可能与血管壁发生反应，致使血管变宽。