在自然数的集合里，每个数字不是奇数就是偶数。

In the set of natural numbers, every number is either odd or even.

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比如：“如果无穷大是奇数，它乘以2得出的数字应是偶数。”

For instance, "if infinity were odd, 2 times infinity would be even."

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用不同的颜色显示奇数行和偶数行，这样读者更容易阅读。

By alternating colors on even and odd rows, it makes the list easier to scan.

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