表示方法有很多
1.This room is for times as big as mine.这个房间是我房间的四倍.
2.This room is three times larger than that one.这个房间比那个房间大两倍.
3.The output of coal has doubled.煤的产量增加了一倍.
4.My aunt is as old again as I am.我姑姑年龄比我大一倍.
5.Productivity is increased three fold.生产效率提高了两倍.
6.The volume of the Sun is about 1300000 times that of the Earth.太阳体积约为地球的1300000倍.
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从书上用手给你敲上来的……
