The rural workforce has been flowing in to the cities ever since the open door policy was adopted.
自从改革开放政策实施以来,农付劳动力正不断流向城市。
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。