单词：Abelian group
Abelian group的用法和样例：
例句
- Moreover, a necessary and sufficientcondition for an abelian group to have test elements is specified.Also, the test elements are determined.作为应用，给出了任意阿贝尔群有检验元素的充分必要条件，并确定了其检验元素。
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