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                   1. 倍数增加的句型译成"是……的n倍"或"比……增加(n-1)倍" 
                      e.g. The output of the 
                    paper mill is now three times as high as it was in 1980. 
                      这家造纸厂的产量比1980年增加两倍。 
                      e.g. Asia is four times 
                    larger than Europe. 
                      亚洲比欧洲大3倍。   
                    2. 倍数减小的句型译成"是……的1/n"或"比……减少(n-1)/n" 
                      e.g. A body would weigh six times less on the moon than 
                    on the earth. 
                      物体在月球上的重量是地球上的1/6。(减少5/6) 
                      e.g. My luggage is twice 
                    as light as his. 
                      我的行李是他行李的1/2。 
                      如果倍数很大,翻译时无需减一。 
                      常见的表示数的增减和倍数的表示方法有: 
                      1. ···倍数+ as +形容词或副词+ 
                    as +··· 
                      2. ···倍数+ 比较级+ than 
                    +··· 
                      3. ···数字+ 比较级+ than 
                    +··· 
                      4. 倍数 + 名词 
                      5. 动词 + by + 数字或倍数(净增加的数字或倍数) 
                     
                      6. 动词 + to + 数字 
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