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汉语拼音：shuǐ zhēng qì

俗称水汽。由水气化或冰升华而成的气态物质。无色无味。空气中含水蒸气的多少，影响空气的湿度。

1. 气态的水。常压下，液态的水加热到100℃时就开始沸腾，迅速变成水蒸气。

   洪深 《五奎桥》第一幕：“地面上的水，受太阳晒了，化成水蒸气。”

• On Earth, it is the condensation of atmospheric water vapor into drops of water heavy enough to fall, often making it to the surface.

  在地球上，是大气水蒸气凝结成水滴的重量达到下，经常在表面。

• Marius could hardly distinguish her through the luminous vapor which had suddenly spread before his eyes.

  马吕斯的眼上登时起了一阵明亮的水蒸气，几乎无法把她看清楚。

• He said the power station process would not produce bad odours and the only discharge seen would be water vapour.

  他指出，发电厂的发电过程不会产生有害气味，其唯一可见的排放物就是水蒸气。

• The state of a substance that exists below its critical temperature and that may be liquefied by application of sufficient pressure.

  水蒸气物质存在于低于临界温度的情况下，并且在施加足够压力情况下能被液化的状态

• During the night it could only be compared to a Niagara of molten fluid, with its incandescent vapors above and its boiling masses below.

  在夜里，只能把它比做岩浆的尼亚加拉大瀑布，它的上面是白热的水蒸气，下面是沸腾的物质。

• "Teddy's back there, " he said breathlessly, pointing back over his shoulder into the billowing clouds of steam.

  “泰迪也来到这儿了。”他气喘吁吁的说着，指了指身后的水蒸气。

• The grandmother laughed. "Oh, that is only steam, " she said. "You can see it coming out of the spout and puffing up under the lid. "

  祖母大笑起来。“呵，那是水蒸气，”她说。“你可以看见水蒸气从壶嘴里喷出来，从壶盖下扑哧扑哧地往外冒。”

• So just from the point of view the number of molecules, water vapor greenhouse effect will far more than carbon dioxide.

  那么单单从分子数目上来看，水蒸气的温室效应就要远远地超过二氧化碳。

• The results show that this model embodies properly channel curve's change and its effects on water vapor diffusion.

  研究结果表明：该模型较好地反映了霜层孔隙率变化时通道弯曲程度的变化，以及这种变化对于水蒸气扩散的影响；