The team discovered that brain temperature spikes in the run-up to a yawn, then starts to decline, and finally falls rapidly to pre-yawn temperature.

他们发现，马上要打哈欠的那一刻，脑部温度达到峰值，然后就开始下降，最后快速降到打哈欠以前的温度。

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The nickel discs are etched with text that starts at a normal size and rapidly shrinks to microscopic.

这种方式便是在镍盘雕刻上文字信息，起初上面的文字都是通常大小，然后会迅速缩小到只有用显微镜才能看得到的程度。

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What you may not realize, Achor says, is that after two hours of continuous work, your brain function actually slows and your body starts to rapidly accumulate stress and strain.

而阿克尔认为，人们不知道的是连续工作两小时后，他们的大脑便会反应迟缓，而身体则会迅速积攒压力和紧张。

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Implantable cardioverter-defibrillators (ICDs) are small battery-powered devices that can deliver a small electric shock to the heart in response to a life-threatening arrhythmia (when the heart starts beating rapidly and inefficiently).

FORBES: Practicing Medicine Against the Evidence: The Case of Implantable Defibrillators

Typically, oil prices slump once production capacity starts to grow rapidly and outstrip demand growth.

FORBES: Better Days Ahead For North American Oil Producers

The railway, too, starts to descend rapidly, repeating its routine of hairpin turns, before entering a world of meadows, orchards and vineyards.

BBC: Full steam ahead