There was a low humming sound in the sky .

空中传来一阵低沉的嗡嗡声。

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Some residents in the Washington DC area saw a blue light in the sky that moved around and made now sound.

华盛顿地区一些居民看到了天空里的蓝光，在天空里四处移动，并发出声音。

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And she pointed into the sky, in the direction of Hogwarts. Dread flooded Harry at the sound of the words.... He turned and looked.

她用手指着霍格·沃茨方向的天空。哈利听见这几个字，内心顿时充满了恐惧……他转眼望去。

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The buzz of the unmanned aircraft's engine - it sounds a little like a home lawn motor that's taken flight - is a common sound in the sky over Gaza, as is the occasional whoosh and thud of its deadly missiles.

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Every day, the night air of the quiet Katsuragawa riverside was broken with the trumpet sound until Orion's Belt made its way lower in the sky.

NPR: 'A Tale of Music': From 'Literature from the Axis of Evil'

It was getting close to midnight in London, and there were no dancers, no waves, no Miami Sound Machine blasting through the August sky.

WSJ: 2012 London Olympics: Jason Gay: A Farewell to Queens of the Beach, Kerri Walsh Jennings and Misty May-Treanor