Investigation reveals that smoke particles kinestate is decided mainly by the relative velocity between smoke cloud and particles and the smoke cloud turbulent intensity.

研究认为，烟幕微粒的运动状态主要决定于烟幕云团与微粒的相对速度和湍流强度。

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A huge smoke cloud from the fire meanwhile was billowing over the Apache-Sitgreaves National Forest about 185 miles (300 kilometers) northeast of Phoenix, near the Arizona-New Mexico border.

与此同时，大火引起的一朵巨大的烟雾云正在菲尼克斯东北约185英里(300公里)，靠近亚利桑那和新墨西哥州边境的阿帕奇-西特格里夫斯国家森林公园上空翻滚。

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The white cloud of smoke floated away.

那团白色的烟雾飘走了。

《柯林斯英汉双解大词典》

Just the two of us, rolling on in a cloud of friendly company and smoke from his cigar.

VOA: special.2010.01.30

A big cloud of smoke rose high in the air over Fort Sumter.

VOA: special.2009.08.13

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

VOA: standard.2009.10.28

Thrush watched a dramatic sunset Sunday through the smoke cloud 40 miles away in Eaton, Colorado.

CNN: 'Very large, unpredictable' Colorado fire grows

Rox said its "highly sophisticated" new smoke cloud system released a heavy fog which reduced visibility when activated.

BBC: Rox in George Street in Edinburgh

Rox said it had now employed a full-time security guard and installed a smoke cloud system as a deterrent.

BBC: Rox in George Street in Edinburgh