自秦汉以来的2000年，古代中国始终处于周期性循环的怪圈中。

In the 2000 years since Qin and Han Dynasties, ancient China was in an odd periodic cycle.

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由于家用空调行业销售具有明显季节性特点，其经销商管理呈现周期性循环的特点。

Because selling of the home air conditioner trade has the obvious seasonal characteristic, its distributor management presents periodic return.

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实证结果表明沪深股市均是有偏的随机游动过程，存在着状态的持续性和非周期性循环。

The empirical results show that Shanghai and Shenzhen stock markets are random walk process with deviation existing state sustainability and non-periodic cycles.

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