With the right voltage, the strip will enter a so-called hysteretic regime - where it will vibrate with one of two amplitudes.

在合适的电压下，硅条会进入一种滞后状态——硅会以两种振幅振动。

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We imagine the ball to consist of innumerable minute particles, called atoms or molecules, which vibrate or whirl around one another.

我们想象一个球是由无数的微型粒子组成，称为原子或分子，一个围绕着另一个振动或旋转。

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Frequencies that an object wants to vibrate at (or is sympathetic to) are called resonant frequencies.

物体想要振动的频率，被称为共鸣频率。

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For those who need a literal nudge, Jawbone built in a service called "idle alert" that makes the bracelet vibrate if you sit still for more than, say, 15 minutes.

WSJ: Sit Up Straight, and Other Advice From Big Mother

But Dr Turin believes that the way smell molecules wiggle and vibrate is responsible - thanks to the quantum effect called tunnelling.

BBC: Perfume chemist