如果一个圈与某个群同痕，那么它与此群同构，因此也为一个群。
If a loop is isotopic to a group, then it is isomorphic to that group and thus is itself a group.
谁用过，效果怎… 个体差异可能效果不同，同… 岁月无痕用的效果不是很好。
Who used to effect … Individual differences might be different, the same … Years traceless use effect is not very good.
周同宾的《天籁》不凿斧痕地将这三个层面和谐统一，以其特有的艺术魅力完成了作者引导读者关注人类生命状态，积极探求生命价值的艺术使命。
With its particular artistic charming, the author leads the readers to pay attention to the life state of the humanity and completes the artistic mission of pursuing the life value actively.
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