5．水蒸气压力（water vapour pressure），单位为kPa，表示由水蒸气引起的空气压力，它是气压的组成部分，图中下部斜线，数值标在图的右下角；见图2.14和图2.39。
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Saturation water vapour pressure 饱和水蒸气压
water-vapour pressure law 水汽压力定律
saturated water vapour pressure [气象] 饱和水汽压
relative water vapour pressure 相对水蒸气压力
The ground effective radiations are calculated based on the ground temperature. air temperature. water vapour pressure and total cloud cover.
再利用地面温度、气温、水汽压和总云量，计算得出福建省各地的地面有效辐射的月、年平均辐照度。
More specifically, we can say that there is a trend towards equilibrium between the water vapour pressure in the product and the partial pressure of the water vapour in the air.
我们可更准确地说，是产品内部的水蒸汽压力与空气中部分的的水蒸汽压力之间有一种趋于平衡的趋势。
The vapour cone effect is caused by pressure differences around the aircraft. A sudden drop in pressure associated with high speed allows water vapour, which is normally invisible, to condense as fog.
蒸汽锥效应是由于战斗机周围的压力差所导致的，高速飞行时压力的陡然降低会使不可见的水蒸气凝结成雾气。
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