单词：idempotent
idempotent的用法和样例：
例句
- This idempotent ultrafilter enables us to find an appropriate infinite set.这个幂等的超滤子能使我们找到一个适当的无限集。
- If it is finite and nonempty, then it must contain at least one idempotent.如果它是有限和非空的，则它必须包含至少一个幂等元。
词汇搭配
- idempotent transformation幂等变换
- idempotent law幂等定律,幂等律...
- idempotent matrix幂等矩阵
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