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。

"Efficient" irrigation is often used to describe systems that result in 85% of the water disappearing in vapor.

“有效”灌溉通常指的都是一些让85%的水最终以水汽的形式逸散的作法。

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。

Fluorescent lights use electricity to excite mercury vapor. This produces ultraviolet light that causes a phosphor coating inside the bulb to glow.

荧光灯用电激发水银蒸气。这会生成紫外线光而使得镀在灯管内壁上的磷涂层发光.

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。

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。

From what I remember, water changes back and forth from water in lakes and oceans to vapor, and then back to water again when it falls as rain or snow, as precipitation.

根据我的记忆，水往复地变化，从湖泊和海洋里的水变成水蒸气，然后当它以雨或雪——也就是降水的形式落下时又变成水。

When the air was warm, vapor containing the heavier isotope, oxygen-18, condensed and formed precipitation, in the form of snow, more readily than did vapor containing oxygen-16.

当空气温度较高时，含有较重同位素氧-18的蒸汽比含有氧-16的蒸汽更容易凝结，并形成雪状的降水。

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。

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。

The pressure will result in the formation of a vapor pocket.

压力将导致形成一个蒸汽口袋。

Air temperature and vapor pressure deficit were the key factors affecting transpiration.

气温和蒸气压不足是影响蒸腾作用的关键因素。

Water vapor goes through my skin.

水蒸气会穿过我的皮肤。

There is vapor pressure lowering.

蒸汽压的下降。

The crisper keeps water vapor in.

该保鲜储藏格可以使水汽保留在里面。

You want to find the vapor pressure.

你需要找出蒸汽压。

You expect the vapor pressure to go down.

可以预计蒸汽压会下降。

Water vapor rose from it. It was beautiful.

在平原附近有一个湖，水汽从湖面升起。

We know there's vapor pressure there, right?

我们知道这里有蒸汽压？

And it's got a certain vapor pressure on top.

在上面施加特定的气压。

Vapor Strange vapors rose from the dark lake.

奇怪的蒸汽从黑暗的湖中升起。

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。