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英语中倍数的表达方法和译法1.A的大小/长度/数量……是B的n倍[A比B大/长/多……）n-1倍]1.BeNtimes有三种句型变体：Aisntimesasgreat（long，much，…）asB.Aisntimesgreater（longer，more，…）thanB.Aisntimesthesize（length，amount，…）ofB.2.IncreaseNtimes句型有四种变体，都译为增加到N倍，或增加N-1倍：increasetontimesincreasentimes／n-foldincreasebyntimesincreasebyafactorofn注：在这类句型中increase常被raise，grow，go/stepup，multiply等词所替代。要注意的是,表示“增加”用times或-fold与以往我们所学的用百分数或具体数值是有所不同的。例如:Itsoutputofcottonwentupby20percent.它的棉花产量增长了20%。Broilers嫩鸡areparticularlysusceptibletostressasgeneticselectionplusbalancedfeedinghavesresultedinbirdsthatmayincreasetheirhatchingweight(40g.)by45timesintenweeks(1800g,or3.7lb).3.Thereisan-foldincrease/growth…某物有N-1倍的增加或增长。Thereisathreefoldincreaseintheproductionofwheatthisyear.即是原来的三倍，比原来多两倍4.double（是2倍，增加1倍），treble（是3倍，增加2倍），quadruple（是4倍，增加3倍），Theefficiencyofthemachineshasbeenmorethantrebledorquadrupled．这些机器的效率已提高了2倍或3倍多。5.此外，英语中还有一种用again而不用倍数词来表示倍数的方法，如：Aisasmuch（large，long，…）againasB.=Aistwiceasmuch（large，long，…）asB.应译为：A是B的两倍翻译练习1.Thisbookisthreetimesaslongasthatone.2.Thedictionaryisexactlyfivetimesmoreexpensivethanthatone.3.Thisbookisthreetimesthelengthofthatone.4.Theproductionofintegratedcircuits(集成电路）hasbeenincreasedtothreetimesascomparedwithlastyear.5.Thedrainvoltage（漏电压）hasbeenincreasedbyafactoroffour.6.Theoutputofchemicalfertilizerhasbeenraisedfivetimesasagainstl986．7.Iftheresistanceisdoubledwithoutchangingthevoltage,thecurrentbecomesonlyhalfstrong.8.Bytheendof2007,thenumberofmobilephoneusersinChinahastrebledthatin2003.9.EffortswillbemadetoquadrupletheGDPoftheyear2000by2020.10.Thissubstancereactsthreetimesasfastastheotherone.倍数的减少第一组：1.Aisntimesassmall（light，slow，…）asB.2.Aisntimessmaller（lighter，slower，…）thanBA的大小（重量，速度，……）是B的1/n第二组：1.decreasentimes/n--fold2.decreasebyntimes3.decreasebyafactorofndecrease常被reduce，shorten，go／slowdown等词替代三种都是减少至原来的1/n第三组：Thereisan-folddecrease/reduction…应译为：减至1/n[或：减少（n一1）/n]。Eg.Arapiddecreasebyafactorof7wasobserved．发现迅速减少到1/7。Joggingcanmakethepossibilityofcatchingaheartdiseasedecreaseby3times.Joggingcanmakeonethreetimeslesslikelytosufferfromaheartdisease.都译成减少到三分之一，即减少了三分之二。翻译练习1.Thehydrogenatomisnearlyl6timesaslightastheoxygenatom.2.Thissortofmembrane(薄膜）istwicethinnerthanordinarypaper.3.Whenthevoltageissteppedupbytentimes，thestrengthofthecurrentissteppeddownbytentimes.4.Theprincipaladvantageoftheproductsisatwo-foldreductioninweight.5.Thecostofthenewbuildingmaterialdecreasedbythreetimes.6.Thenewconstructionequipmentwillshortenthreetimestheconstructionperiod.7.Byusingthisnewprocess，thelossofheatenergywasreducedbyafactorof3.8.Ifyoutreblethedistance,thegravitationalattractiongetsninetimesweaker.