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汉语拼音：ǒu shù

能被2整除的整数。如0、＋2、－2、＋4、－4等。正偶数也叫双数。

1. 能被2整除的整数。如＋2，－2，＋4，－4。正偶数俗称“双数”。

   阿英 《＜察哈尔窗花＞叙记》：“重视偶数的装饰品，注重对称的形式，这同样是窗花的一个特征。” 徐迟 《哥德巴赫猜想》三：“一七四二年， 哥德巴赫 发现，每一个大偶数，都可以写成两个素数的和。”

• Thirty is an even number.

  三十是个偶数.

• Thirteen is not divisible by any even number.

  13不能被任何偶数除尽.

• 4, 6, and 8 are even numbers but 5 and 7 are not even.

  四 、 六和八是偶数,五和七不是.

• The sum of any two elements has an even number of prime factors.

  其中任何两个元素之和有偶数个素因子.

• A circ is an undirected graph having only vertices of even nonzero degree.

  一广义圈是一无向图,其顶点次数都是非零偶数.

• We present a class of anti - sociable numbers which are even.

  给出了一类偶数中的孤立数.

• Sprocket most taboo even sprocket , the chain sprocket on the accelerated wear!

  最忌讳偶数,这样的对链条加速磨损!

• All east - west interstate highways are even - numbered and increase from south to north.

  所有东西向的州际高速公路都用偶数标号,数字从南往北递增.

• Interlaces the odd and even scan lines of a video clip.

  隔行扫描奇数和偶数视频片段的扫描行.

• In printing, any left handed, even numbered page of a book.

  在印刷技术中, 书中左边的 、 偶数编号的那些页.

• There are two kinds of numbers, odd and even.

  世上只有两种数字:奇数和偶数.

• For books open by the right, these pages are the left - hand pages.

  从右翻开的书, 偶数页在左边.

• The figures are all even numbers. Please add them up.

  这些数字都是偶数, 请把它们加起来.

• How many four - digit positive integers have their product of digits even?

  数字之积为偶数的四位正整数共有多少个?

• Nine is an odd number and ten is an even number.

  九是奇数,十是偶数.