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发帖数: 6504 | | m********i
发帖数: 5 | | m********i
发帖数: 5 | | m********i
发帖数: 5 | | m********i
发帖数: 5 | | m********i
发帖数: 5 | | b******r
发帖数: 1 | 7 google 了一下。
DescriptionIn set theory, an ordinal number, or ordinal, is one
generalization of the concept of a natural number that is used to describe a
way to arrange a collection of objects in order, one after another. |
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