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。
In their efforts to persuade us to buy this or that product, advertisers have made a close study of human nature and have classified all our little weaknesses.
做广告的人在力图劝说我们买下这种产品或那种产品之前,已经仔细地研究了人的本性,并把人的弱点进行了分类。