The surface dust, low humidity of the air, ground and traffic dust stirred up.
地面灰尘大，空气湿度低，地面的人和车流使灰尘搅动起来。
The daily change of air humidity in surface layer is contrary to that of temperature.
近地层空气湿度的日变化与温度相反。
The daily change of air humidity in surface layer is contrary to that of temperature.
近地层空气湿度的日变化与温度相反。
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