循环级数是组合论中的重要内容之一 ，是计数和作算法分析的基础。
The order cyclic series is one of the important contents of the combination theory, and it is the basis of counts and analysis of algorithm.
该方法不必固定级数，即不含级数循环，因而比常用的矩阵法编程简单且计算耗时短。
The method needs more simple programming and less computational cost than the most general matrix method because it does not includes the iteration for stage number.
该方法不必固定级数，即不含级数循环，因而比常用的矩阵法编程简单且计算耗时短。
The method needs more simple programming and less computational cost than the most general matrix method because it does not includes the iteration for stage number.
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