文档介绍：倍数增加与减少的表达
倍数增加(1)
A是B的N倍
A is N times as …as B
A is N times …er than B
A is N times the size/amount/length…of B
Eg. 小麦产量是水稻的两倍。
The output of wheat is twice as much as that of rice.
Eg. 今年的出口比去年增加了一倍。
The export of this year is twice as much as what is was last year.
倍数增加(2)
Increase N times
Increase to N times
Increase by N times 增长到…倍(or: x N)
Increase by a factor of N
N-fold increase in sth.
Increase 常被raise, grow, go/step up, multiply等词替代
Eg. In 2004-5, 418 under-16-year-olds were referred to the Scottish drug misuse database (SDMD) compared with 106 in 1996-7.
(Youth drug problems increase four-fold since 1997.)
倍数增加(3)
表达两倍的特殊用法:
A is as much (large, long…) again as B
A is twice as much (large, long…) as B
A is half as much (large, long…) again as B
(=A is one and a half times as much as… B)
倍数增加(4)
翻倍与翻番:
double 成两倍,翻一番
triple,treble 成三倍
quadruple 成四倍,翻两番
quintuple 成五倍
sextuple 成六倍
septuple 成七倍
倍数减少
A is N times as small (light, slow…) as B
A is N times smaller (lighter, slower…) than B
Decrease N times/N-