1945年 7月 ,黄炎培先生在延安与毛泽东探讨历史兴亡周期现象 ,随后 ,出版了《延安归来》一书 ,用了“周期率”一词。近几年来 ,有人认为“周期率”是对“周期律”的误引或者误用。而笔者认为 ,“误引说”或者“误用说”是不成立的 ,应该用“周期率”。我们能够找到的最早对“ In July 1945, Mr. Huang Yanpei explored the cycle of historical ups and downs in Yan’an and Mao Zedong. Subsequently, the book “Return of Yan’an” was published and the term “cycle rate” was used. In recent years, some people think that the “cycle rate” is a misinterpretation or misuse of the “periodic law.” The author believes that “misleading” or “misuse” is not established, we should use the “cycle rate.” We can find the earliest "