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The ancient Chinese sentence marking method which includes the write tool" dianzi" and the write pigment" danqian" and the rules about how to mark the sentence and clause,is the unprecedented undertaking matter of the cultural history.

中国古代句读标识法包括书写工具“点子”和书写颜料“丹铅”的制作和使用方法以及句读标识方法的详尽规定,是文化史上的创举和盛事。

Abstract; By investigating the structure of the focal subgroup of a Hall subgroup we obtain some results concerning with TT -quotient groups.

通过引入强Dπ-群的Hallπ-子群的驯交与相关的概念并应用于转移理论和焦点子群的讨论,得到若干关于π-商群的结果。