表优点的几个方面：
　　Equip sb. with sth.
　　Cost-efective
　　Give sb. a sense of independence.
　　Benefit the society as a whole.
　　Broaden their horizons. Have a broder view of life
　　The price is worth paying.
　　Not necessarily all bad
　　Work for the public good
　　表缺点的几个方面：
　　Time-consuming