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。
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.
虽然制冷系统会降低空气的湿度(因为凝结作用会带走部分水蒸气)，但是蒸汽冷却器却能够增加空气湿度。
Whereas refrigerative systems reduce the humidity of air (because some water vapour condenses and is drained away), evaporative coolers increase humidity.
热蒸馏涉及到加热：沸腾的水变成水蒸气- - -盐分留了下来- - -被收集的蒸汽冷却后凝结成水。
Thermal distillation involves heat: Boiling water turns it into vapor-leaving the salt behind-that is collected and condensed back into water by cooling it down.
叙述了介绍了气体膜分离技术在分离空气制备富氧、富氮，水蒸气、有机蒸汽的分离和氢气回收等工业领域的应用。
Various applications of gas separation membrane were reviewed in details, such as medical rich oxygen, air separation, water vapor separation, hydrogen recovery in refinery gas and so on.
如果温度一定，空气中的水蒸汽含量与不饱和状态下最大水蒸气含量就有相对关系。
The amount of water vapor in the air relative to how much water vapor the air can "hold" before saturation occurs at a given temperature.
如果温度一定，空气中的水蒸汽含量与不饱和状态下最大水蒸气含量就有相对关系。
The amount of water vapor in the air relative to how much water vapor the air can "hold" before saturation occurs at a given temperature.
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