2014.05.18【英译汉】The Curious Incident of the Dog in the Night-Time⑧

猫四狗八 (ho) 路人甲
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发表于:2014-05-19 14:07 [只看楼主] [划词开启]
19.  Chapters in books are usually given the cardinal numbers 1, 2, 3, 4, 5, 6 and so on. But I have decided to give my chapters prime numbers 2, 3, 5, 7, 11, 13 and so on because I like prime numbers.
This is how you work out what prime numbers are.
First you write down all the positive whole numbers in the world.

小说里章节通常是按基数1,2,3,4,5,6的顺序,而我决定在书里用质数2,3,5,7,11,13,因为我喜欢质数。然后我想说一下怎么找质数。首先把所有正数都写下来。


Then you take away all the numbers that are multiples of 2. Then you take away all the numbers that are multiples of 3. Then you take away all the numbers that are multiples of 4 and 5 and 6 and 7 and so on. The numbers that are left are the prime numbers.

然后把所有能被2整除的数划掉,接着把能被3整除的数划掉,把能被4,5,6,7整除的数都划掉,以此类推,剩下的就是质数了。


The rule for working out prime numbers is really simple, but no one has ever worked out a simple formula for telling you whether a very big number is a prime number or what the next one will be. If a number is really, really big, it can take a computer years to work out whether it is a prime number.

找质数的算法是十分简单的,但却没人找到判断一个很大的数或它的下一个数是质数的公式。如果一个数真的很大,计算机可能会花好几年才判断它是不是质数。


Prime numbers are useful for writing codes and in America they are classed as Military Material and if you find one over 100 digits long you have to tell the CIA and they buy it off you for $10,000. But it would not be a very good way of making a living.

质数对编程很有帮助,而且美国将它归为军事材料,如果你把一百位以上的质数告诉中情局的话,他们就会用10000美金买下来。但以此维生似乎不是一个明智的选择。


Prime numbers are what is left when you have taken all the patterns away. I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them.

质数是去掉其他形式数字后剩下来的。我认为质数如同生活,它们都符合逻辑,但就算你绞尽脑汁也找不到它们的规律。

最后编辑于:2014-10-29 18:31
分类: 英语
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