I used to stop for hitch-hikers'till the day I picked up that maniac.
自从有一天搭了一个精神病人以后,我碰到搭顺风车的人就不再停下来了。
The body's tissues are self-repairing and self-restoring to a degree, and function best when more or less continuously active.
人体组织在一定程度上有自我修补和自我恢复的能力,有张有弛地连续活动时,其功能最佳。