It is a wave, a vibration, a pulsation at the very heart of the All That is.

它是在一切万有心中的一个波动、一个震动、一个脉动。

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Vibration is caused by periodic high pulsation of airflow resulted from the center eddy behind the inlet damper.

确定振动是由入口调节门后中心涡流引起的气流周期性高脉动造成的。

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High efficiency, low noise, no pulsation, air conveyed carrying no fuel, marginal vibration.

效率高、噪音低、无脉动、输送气体中不含油气，振动极微。

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There are a series of variations, and in the last one Beethoven takes the theme from a quarter note pulsation through every diminution until it becomes mere vibration.

WSJ: Plumbing the Depths of Beethoven | Richard Goode | Cultural Conversation by Stuart Isacoff