But with time passing and nightfall bringing freezing temperatures, the chances of survival seemed to be dimming, and bodies, wrapped in colorful shrouds, piled up in the city.

然而，随着时间过去，加上晚上极低的温度，幸存的希望似乎越来越渺茫。遗体，由彩色的尸布裹起，堆在城里。

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This Pavlovian technique resulted in the rats freezing up in nervous anticipation of the shocks every time they heard either sound.

这种巴普洛夫技术产生了这种结果：每次老鼠听到其中一种声音就会怕被电击而变得非常紧张。

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I left the shutter open to capture his flashing flight path, freezing minutes of time and action into a single image.

我打开相机快门，捕捉它闪过的飞行路径。拍了几分钟，然后合成了一张图片。

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Considering normal New York January highs hover just above freezing, with water temperatures not much warmer, staying in for any amount of time is no small feat.

BBC: An icy dip off the coast of NYC

At the time of the crash there was low cloud, poor visibility and patches of freezing fog.

BBC: London helicopter crash: Crane work resumes on tower

Still, there's now a freezing wind blowing outside and that appears to be blowing away much of the smog, just in time for Sunday's marathon.

BBC: China diary: Beijing air and Weibo warriors