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英語(yǔ)表示倍數(shù)增減或倍數(shù)對(duì)比的句型多種多樣，其中有 一些（如下文中的句型⑵、⑸、⑹、⑻、⑿ 等）很容易譯錯(cuò)，其主要原因在于：英漢兩語(yǔ)在表述或?qū)Ρ缺稊?shù)方面存在著語(yǔ)言與思維差異?，F(xiàn)將常用的英語(yǔ)倍數(shù)句型及其正確譯法歸納如下：
倍數(shù)增加
（一）A is n times as great (long, much, ...) as B. ⑴
A is n times greater (longer, more, ...) than B. ⑵
A is n times the size (length, amount, ...) of B. ⑶
以上三句都應(yīng)譯為：A的大?。ㄩL(zhǎng)度、數(shù)量、……）是B的n倍，或A比B大（長(zhǎng)、多、……）n-1倍。
eg: This book is three times as long as that one. / three times longer than that one. / three times the length of that one.
這本書的篇幅是那本書的3倍（即比那本書長(zhǎng)兩倍）。
注：當(dāng)相比的對(duì)象B很明顯時(shí)，than (as, of) B 常被省去。
（二）increase to n times ⑷
increase n times / n-fold ⑸
increase by n times ⑹
increase by a factor of n ⑺
以上四句均應(yīng)譯為：增加到n倍，或增加n-1倍。
eg: The production of integrated circuits has been increased to three times as compared with last year.
集成電路的產(chǎn)量比去年增加了兩倍。
eg: The output of chemical fertilizer has been raised five times as against 1986.
化肥產(chǎn)量比1986年增加了4倍。
eg: That can increase metabolic rates by two or three times.
那可使代謝率提高到原來(lái)的2倍或3倍（即提高1倍或2倍）。
eg: The drain voltage has been increased by a factor of four.
漏電壓增加了3倍（即增加到原來(lái)的4倍）。
注：在這類句型中increase常被raise、grow、go/step up、multiply 等詞所替代。
（三）There is a n-fold increase / growth... ⑻
應(yīng)譯為：增加n-1倍，或增至n倍。
這個(gè)句型還有其它一些形式：
eg: A record high increase in value of four times was reported.
據(jù)報(bào)道，價(jià)值破記錄地增長(zhǎng)了3倍。
（四）double（增加1倍）、treble（增加2倍）、quadruple（增加3倍）⑼
eg: The efficiency of the machines has been more than trebled or quadrupled.
這些機(jī)器的效率已提高了2倍或3倍多。
（五）此外，英語(yǔ)中還有一種用again而不用倍數(shù)詞來(lái)比較倍數(shù)的方法，如：
A is as much (large, long, ...) again as B. = A is twice as much (large, long, ...) as B. ⑽
應(yīng)譯為：A比B多（大、長(zhǎng)、……）1倍。
A is half as much (large, long, ...) again as B. = A is one and a half times as much (large, long, ...) as B. ⑾
應(yīng)譯為：A比B多（大、長(zhǎng)、……）一半，即A是B的一倍半。
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