个体价格的波动频率是个重要的问题。

How often individual prices move is an important question.

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振幅、相位、进动角速度在过临界后的波动频率随转速增加而增加。

The minimum and maximum of amplitude fluctuation correspond with the minimum of precession speed after the critical point on the response curve.

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实验结果表明，流体在摇摆作用下产生波动； 波动频率与摇摆频率一致。

The result showed that the fluid fluctuated under rolling motion, and the frequency of the fluctuation was the same as the rolling frequency.

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