Relative humidity, a percentage, is the ratio between the water vapor present and the air's saturation point, a figure that changes with the temperature.
相对湿度，是空气中绝对湿度与饱和湿度的比值，它随着温度变化。
Relative humidity RH refers to the humidity saturation percentage of the air in certain volume.
相对湿度RH是指一定容积内空气的湿度饱和百分比。
Percentage ration of the actual vapour pressure in the air to the saturation vapour pressure with respect to water at the same temperature and pressure.
空气中的实际水气压与在相同温度和气压下的水面饱和水气压的百分比。
Percentage ration of the actual vapour pressure in the air to the saturation vapour pressure with respect to water at the same temperature and pressure.
空气中的实际水气压与在相同温度和气压下的水面饱和水气压的百分比。
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