Decide the functions of the underlined cardinalnumbers in the following sentences.
指出以下句子中划线（红色）部分的基数词的语法作用。
2
For the finite set, the ordinal and cardinalNumbers are equivalent, but they differ in the infinite case.
有限集，有序和基数是等价，但他们在不同情况下的无限。
3
In this paper the author has discussed several questions on universal, especially introduced some functions on cardinalnumbers in universal algebras and made some discussions on them.