表示"几倍于"
用twice (两倍)，three times(三倍)等加as...as..
如：
New York is ten times as big as my home town.纽约有我的家乡十个大。
The output of the paper mill is now three times as high as it was in 1966.这家纸厂的生产比一九六六年增加两倍。
This river is twice as long as that one.这条河比那条河长一倍。
Asia is four times as large as Europe.亚洲比欧洲大三倍。
[注]表示"几倍于"也可以用下面的说法，如：
Three times three is nine.三乘三得九。
He is twice my age.他的年龄比我大一倍。
This lake is four times the size of that one.这个湖有那个湖四个大。
The irrigated area in this province is four times bigger than in l978.这个省的灌溉面积比1978年增加三倍。(four times bigger than = four times as big as)
Our county's agricultural output this year is 5 per cent higher than that of last year.我们县今年农业产量比去年增长百分之五。
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