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
Make no economic sense
Economically worthless
Out of date
A waste of time
