一般有以下两种英语表达方法;

(1) A is N times as large/long (形容词/副词原形) as B. Eg: Asia is four times as large as Europe.

(2) A is N times larger/longer(形容词/副词比较级)than B. Eg: Asia is four times larger than Europe.

(3) A is N times the size/length (形容词/副词的名词形式) of B. Eg: Asia is four times the size of Europe.

以上三句例句的中文翻译均为：亚洲是欧洲的四倍大，或者亚洲比欧洲大三倍。

小编吐槽：全国的老师都欺骗了我们啊！说实话，看到Asia is four times larger than Europe.第一个反应是亚洲比欧洲大四倍，有木有？可这个翻译是错的！来自五湖四海的英语小编们个个跳出来指认，从小到大，老师都是这么教的，考试也是这么考的，怎么会错呢？于是，遍查资料后发现，全国的老师好像都错了......还是不死心，这要是错了，简直是推翻了我们从小到大的人生观啊。抱着最后一丝希望，请教了外教，于是，人生观无情地被颠覆了。所以，全国的同学们，请大家从此牢记：A is N times larger/longer than B的这个用法就是“A是B的N倍大/长，A比B大/长N-1倍”！切记，切记啊！

2. by和to

(1)动词+ by + 倍数/百分数/数词

Eg: The production of grain has been increased by four times this year.

今年粮食产量增加了四倍。

(2)动词+ to + 数词

Eg: Last year profits rose to $201 million.

去年利润增长到2亿零100万美元。

3. by a factor of

词组by a factor of在《朗文双解》中的解释为"if something increases or decreases by a factor of N, it increases or decreases by N times."以N倍的系数增加或减少。这个解释表达不是很明确，现在把它分成以下两种情况来分析：

(1)表示增加含义时

Increase/grow…by a factor of N times增加到N倍，或者增加了N-1倍

Eg: The output of diesel oil for farm use has been increased by a factor of five times these years.

这些年来，用于农业生产的柴油产量增加了四倍。

(2)表示减少含义时

Decrease/fall…by a factor of N times减少到1/N，或者减少了(N-1)/N。

Eg: The production has decreased by a factor of three times as against 1977.

总产量减少到1977年的三分之一。

结语：倍数翻译的陷阱很多吧，而且每个陷阱都是绵里藏针，针针见血，见血封喉！要想在倍数翻译上不出错，除了基本的语法过关外，还要仔细检查，认真思考，一点点小小的差异都有可能造成误译、错译。所以，让我们一起认真学习钻研数字翻译、倍数翻译的方法，攻克重重堡垒，到达胜利彼岸