Pale white haze (possibly smoke from fires in central America) hangs over the Gulf, partially obscuring the view of the oil slick.
淡白色薄雾笼罩在海湾上空(可能烟雾来自美国中部的大火），浮油观测部分模糊。
The smooth gray-brown smoke hangs over the Russian landscape, completely obscuring the ground in places.
滚滚的浓烟盘旋在空中，将俄罗斯完完全全的遮住。
Improvement of obscuring effect in middle and far infrared waves is the aim of study about combustion smoke-producing mixtures.
该论文研究旨在提高燃烧型发烟剂的中远红外波段的遮蔽能力。在热力学计算和烟幕红外透过率测试的基础上，进行配方设计。
Improvement of obscuring effect in middle and far infrared waves is the aim of study about combustion smoke-producing mixtures.
该论文研究旨在提高燃烧型发烟剂的中远红外波段的遮蔽能力。在热力学计算和烟幕红外透过率测试的基础上，进行配方设计。
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