文中利用并元变换的不进位性质，给出了一种构造最佳周期互补二元序列偶族的新方法。

By taking advantage of the characters of dyadic theory, a new method for constructing families of perfect periodic complementary binary sequences pairs (PCSPF) is proposed.

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在一位数加多位数不进位加法口算中，口算时间差异主要源于运算时间差异和整合时间差异；

In the non-carry mental addition of 1-digit number and multi-digit number, mental arithmetic time differences lie in arithmetic time differences and integration time differences.

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