On this same tack, you could take the barometer to the top of the building, attach a long rope to it, lower it to just above the street, and then swing it as a pendulum.

根据同样方法，将气压计带到屋顶，拴上一个长绳，直垂地面，像钟摆一样摆动。

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This paper briefly introduces the structure and principle of a new system of self-excited oscillations, which is a magnetic pendulum with swing-controlled switch.

本文将对一种新的自激振动系统，即带有摆控开关的磁力摆的结构、原理及实验结果作一扼要的介绍和讨论。

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That's partly because capital has taken such a large share of profits for so many years that the pendulum is bound to swing back and partly because, having just given trillions of dollars to the banks, politicians will be under pressure to put vast amounts of money into saving jobs.

ECONOMIST: World economy: The jobs crisis | The