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(一) A is N times as great（long, much，）as B. （①） A is N times greater （longer, more，）than B. （②） A is N times the size （length, amount，）of B. （③） 以上三句都应译为：A的大小（长度，数量，）是B的N倍. e.g. This book is three times as long as （three times longer than/three times the length of）that one. 这本书的篇幅是那本书的3倍（即长两倍）。 注：当相比的对象B很明显时，than (as，o f) B常被省去。 (二) increase to n times（④） increase n tim es／n-fold（⑤） increase by n times（⑥） increase by a factor of n（⑦） 以上四式均应译为：增加到n倍 (或：增加n-1倍)。 e.g. The production of integrated circuits has been increased to three times as compared with last year. 集成电路的产量比去年增加了两倍。 e.g. The output of chemical fertilizer has be en raised five times as against l986. 化肥产量比1986年增加了4倍。 e.g. That can increase metabolic rates by two or three times. 那可使代谢率提高到原来的2倍或3倍（即提高1倍或2倍）。 e.g. The drain voltage has been increased by a factor of four. 漏电压增加了3借（即增加到原来的4倍）。 | 
