在自然数的集合里，每个数字不是奇数就是偶数，不存在一个偶数或多或少比另一个偶数更像偶数这样的情形。

In the set of natural Numbers, every number is either odd or even, and there is not one even number that is more or less even than any other even number.

youdao

最多存在两个奇数度的路口，其它所有路口的度均为偶数，即有偶数条街道与该路口相连。

There will be at most two intersections with odd degree. All other intersections will have even degree, i. e. , an even number of streets meeting at that intersection.

youdao

事实上，红包里的钱的数目通常是诸如600或者800一类的偶数，因为偶数在中国文化中被赋予了幸运吉祥的寓意。

Actually, the amount of money in hongbao usually come in even numbers like 600 and 800, as even numbers are supposed to be lucky in Chinese culture.

youdao

On the next step though, this, we get substituted by that. Right, on the next step, I'm back in the even case, it's going to take six more steps, plus t of b minus 1. Oops, sorry about that, over 2.

这一步就是偶数了，这一步会让我们得到，6+t这样的结果，因为b-1现在是偶数了,别忽略这里的细节。

麻省理工公开课 - 计算机科学及编程导论课程节选