He admitted himself into a rehab center in order to abstain from alcohol. 他讓自己住進勒戒中心，好讓自己能戒掉酒癮。

The doctor told him to abstain from excessive exercise. 醫生告訴他要避免過度的運動。

感覺讓我想到在背GRE單字..

哈～　這都是從Studioclassroom摘錄下來的，正想用plurk來複習