The pollen can be carried aloft and travel great distances in the upper air stream.

花粉能被带到高处,并在高层的气流中被带至很远的距离.

辞典例句

For they are as light as upper air.

因为他们的身子是空气似的轻.

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They are as light as upper air!

他们的身子是像空气似的轻.

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Usually, such harmful fumes rise into the upper air and are blown away by the wind.

这种有害烟尘通常会上升到空气的上层,被风吹散.

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In different seasons and different time periods, surface and upper air meteorological factors play different roles.

在不同季节、不同时期, 地面和高空气象因子作用是不同的.

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