Then it snows because as the air rises, it cools off and loses its capacity to hold water vapor.
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。
Such feedbacks might involve ice on land and sea, clouds, or water vapor, which also absorb radiant heat.
这种反馈可能涉及陆地和海洋上的冰、云或水蒸气，这些也会吸收辐射热。
Astronomers therefore prefer dry sites with little water vapor, which is generally found at higher altitudes.
因此，天文学家更喜欢水蒸气很少的干燥地点，而水蒸气通常出现在海拔较高处。
One of these is the subtraction of water from the ocean by means of evaporation—conversion of liquid water to water vapor.
其中之一是通过蒸发的方式，把液态水转化为水蒸气——来减少海洋中的水分。
The same structure that permits the one gas to enter the leaf, however, permits another gas—water vapor—to be lost from it.
同样的结构允许一种气体进入叶子，然而，也使得另一种气体——水蒸气——从叶子中消失。
The same structure that permits the one gas to enter the leaf, however, permits another gas—water vapor—to be lost from it.
同样的结构允许一种气体进入叶子，然而，也使得另一种气体——水蒸气——从叶子中消失。
Within about a millimeter of the water, air temperature is close to that of the surface water, and the air is nearly saturated with water vapor.
在离水不到一毫米的地方，空气的温度接近于地表水的温度，空气中的水蒸气几乎饱和了。
With temperatures rising and more water vapor in the air, such storms can pull in more moisture and thus rain or snow more heavily than storms of old.
随着气温升高，空气中的水蒸气增多，这样的风暴会吸收更多的湿气，因此雨雪会比以前的风暴来得更猛烈。
The assumption of constant relative humidity is important, because water vapor in the atmosphere is another efficient absorber of radiation at infrared wavelength.
相对湿度恒定的假设是重要的，因为大气中的水蒸气是红外波长辐射的另一种有效吸收剂。
An increase in temperature, for example, can boost the moisture content of the atmosphere, which then causes further warming because water vapor is a greenhouse gas.
例如，温度的升高会增加大气中的水分含量，这又会导致进一步的变暖，因为水蒸气是一种温室气体。
Because warm air can hold more moisture than cool air, the relative humidity will be constant only if the amount of water vapor in the atmosphere increases as the temperature rises.
因为温暖的空气比冷空气能容纳更多的湿气，所以只有当大气中的水蒸气量随着温度的升高而增加时，相对湿度才会保持不变。
Water vapor goes through my skin.
水蒸气会穿过我的皮肤。
The crisper keeps water vapor in.
该保鲜储藏格可以使水汽保留在里面。
Water vapor rose from it. It was beautiful.
在平原附近有一个湖，水汽从湖面升起。
Cup of water vapor emitted slightly, tea quietly afloat.
杯子冒出微微的水汽，茶叶静静浮着。
Water vapor accounts for about 4% by volume in moist areas.
在气候潮湿地区，水汽按体积占(空气体积)4%左右。
Water vapor is lighter, which would otherwise not rise into air.
水汽(比空气)较轻，否则它不会升到空中。
The hot towers allow water vapor to reach unusually high altitudes.
这些热塔使水汽上升到非同寻常的高度。
SOx's combine in the air with water vapor to create sulfuric acid.
SOx混含在空气中，通过水蒸汽造成硫酸。
On the other hand, with more water vapor wouldn't there be more clouds?
另一方面，如果有更多的水蒸气，难道不会产生更多的云层吗？
Their shade cools the planet and their water vapor traps heat from the sun.
云彩的阴影使地球变得凉爽，云彩中的水蒸气则留住了来自太阳的热量。
This is not going to be any water vapor at one bar pressure on that cylinder.
这里不会有任何水蒸气，在利用圆柱活塞，外加一个大气压的压力的情况下。
If Webb measures water vapor, it would suggest that oceans exist on the planet.
如果韦伯测量到了水蒸气的话，这将表示在星球上还有海洋存在。
This map shows the distribution of water vapor in Earth's atmosphere during August 2010.
这张地图展示了2010年八月期间地球大气层中的水蒸气分布情况。
Most elementary school students learn that clouds form when enough water vapor condenses.
大多数小学生都学过当水蒸气凝结到一定程度就形成了云。
And water vapor pressure is lower when the air is cooler, meaning sweat evaporates faster.
凉快时水蒸发压低，这意味着汗水能很快蒸发。
Mixed with smoke, the air rises high enough for its water vapor to condense and form clouds.
热气加上烟雾升得很高，足使水蒸气变成云。
A stoma is an opening through which carbon dioxide goes in and oxygen and water vapor escape.
气孔是二氧化碳进入而氧气和水蒸气逸出的开口。
A stoma is an opening through which carbon dioxide goes in and oxygen and water vapor escape.
气孔是二氧化碳进入而氧气和水蒸气逸出的开口。
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