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来源:雅诚德英语网
Two sets are said to be equivalent if and only if they can be placed in one-to-one correspondence.
当且仅当两个集合中的元素一一对应时,才称它们为等势。
Two sets are said to be equivalent if and only if they can be placed in one-to-one correspondence.
当且仅当两个集合中的元素一一对应时,才称它们为等势。