Sum of any finitely many nil left ideals of A is also a nil left ideal of A.
的任意有限多个诣零左理想之和仍为A的诣零左理想；
Furthermore, the notion of completely fuzzy left ideal is presented and its particular properties in regular semigroups are obtained.
进一步给出完全模糊左理想的概念，讨论了它在正则半群中的一些特殊性质。
Furthermore, the notion of completely fuzzy left ideal is presented and its particular properties in regular semigroups are obtained.
进一步给出完全模糊左理想的概念，讨论了它在正则半群中的一些特殊性质。
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