The towering cloud is circular. It is surrounded by hazy, gray-white smoke.

堆起的云团呈圆形，其被模糊的灰白色烟雾所笼罩。

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In some of the pictures, the tops of the nearby Woolworth Building and other skyscrapers can just be seen above the enormous cloud of debris, gray against a clear blue sky.

在这些照惩中，这伍尔沃斯大楼的顶部和其它的摩天大楼仅仅看到巨大的瓦砾堆上的烟，灰色笼罩了明净的蓝天。

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At that moment, I'm awe-struck by the power of the season changing from winter to spring, and I realize the spectacle would not be as beautiful without the dark gray cloud on the horizon.

那一刻，我对四季轮回的季节变化深感敬畏，我知道，若非地平线尽头那一抹暗灰色的云彩，这个景象也不会如此美丽。

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A large fire then broke out, engulfing several shops and spewing a cloud of gray smoke over the area.

VOA: standard.2009.10.28

Their solution was to yield most of the canvas or panel to the gray, fog-and cloud-filled sky (curator Emilie Gordenker, director of the Mauritshuis, calls them "our Dutch mountains"), with blue openings torn into the gray here and there so that spots of sunlight could illuminate parts of the land or water below.

WSJ: de Young Museum: More Than Just the Girl

Pretty soon the numbers began to portray a picture that turned the puffy white cloud to gray and foreboding.

FORBES: It IS just Arithmetic

Dune after dune, rising and falling beneath his feet, then finally falling, falling, falling all the way to a gray-green-blue vastness, riffled, glinting, and crossed by the cloud shadows as far as the eye could see.

NEWYORKER: Ziggurat