水蒸气，是水（H2O）的气体形式。当水达到沸点时，水就变成水蒸气。在海平面一标准大气压下，水的沸点为99.974°C或212°F或373.15°K。当水在沸点以下时，水也可以缓慢地蒸发成水蒸气。而在极低压环境下（小于0.006大气压），冰会直接升华变水蒸气。水蒸气可能会造成温室效应，是一种温室气体。
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不同干湿条件下混凝土表层内水分传输 - 中南大学学报（自然科学版、英文版） 关键字: 混凝土；液岛；水蒸气；水分传输[gap=1411]Key words: concrete; liquid island; water vapor; water transport
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侧向风速对飞机尾流运动的影响_stmopen 关键词】: 飞机 尾流 对流扩散方程 侧向风速 水蒸气 [gap=920]eywords】: aircraftwake vortexconvectiondiffusion equationcrosswind speedwater vapor
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短语
水蒸气蒸馏 steam distillation ; Hydrodistillation ; Water-steam distillation ; wet distillation
水蒸气计 atmidometer ; atmometer
饱和水蒸气压 Saturation Vapor Pressure ; Saturated water vapor pressure ; Saturation water vapour pressure ; body temperature pressure saturated
水蒸气蒸馏法 Steam distillation ; Steam distillation method ; technology of wet distillation ; Distillation method of water vapour
水蒸气透过率 WVTR ; WVP ; MVTR
水蒸气保护电弧焊 water vapour arc welding
开管水蒸气氧化 open tube steam oxidation
水蒸气转化 steam reforming
水蒸气的流入 inflow of water vapour ; IOWV
双语例句原声例句
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云是由大气中的水蒸气凝结成的。
A cloud is a condensation of water vapour in the atmosphere.
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水蒸气凝成了小水滴。
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然后就会下雪，因为当空气上升时，它就会冷却并失去保持水蒸气的能力。
Then it snows because as the air rises, it cools off and loses its capacity to hold water vapor.
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There's the water phase, there's the ice cube is the solid phase, and there's some water, gas, vapor, and that's one bar.
里面放一块冰，这是固态；,于是我们得到了水，冰和水蒸气三态共存的点。
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And, even Cavendish, one of the things that he observed was that hydrogen could be combusted to produce water vapor.
甚至卡文迪许都观察到了,氢气燃烧,会产生水蒸气。
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The partial pressure of the water, of gaseous water above that equilibrium of ice and water is not one bar, it's much less.
哪里错了吗？,问题在于,冰水混合物上方的,大气中水蒸气的分压，不是一个大气压。
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