It's constantly being recycled through evaporation and condensation.
它通过蒸发和冷凝不断循环。
The sand acts like a sponge and filters the water and slows evaporation.
沙子像海绵一样过滤水，并减缓蒸发的进程。
Less solar energy is lost in evaporation at the frigid poles than in the tropics.
与热带地区相比，在寒冷的两极蒸发中损失的太阳能更少。
Furthermore, if the water ice was mixed in with rock and dust, it would be protected from evaporation.
此外，如果水冰与岩石和灰尘混合在一起，它就不会蒸发掉。
Increasing salinity caused by the evaporation resulted in the extermination of scores of invertebrate species.
蒸发引起的盐度增加导致了无脊椎动物物种的灭绝。
It depends on the rate at which water enters the lake, and that depends on the rainfall and the evaporation rate.
这取决于水进入湖泊的速度，而这又取决于降雨量和蒸发率。
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。
Since lake levels are controlled by rates of evaporation as well as by precipitation, the interpretation of such levels is ambiguous.
由于湖泊水位是由蒸发率和降水量控制的，对这种水位的解释是模糊不清的。
The oxygen isotope ratio of the ocean changes as a great deal of water is withdrawn from it by evaporation and is precipitated as snow to form glacial ice.
随着大量的水通过蒸发被抽离，并以雪的形式沉淀形成冰川冰，海洋中氧同位素的比率就发生了变化。
Clouds are formed from the evaporation of the oceans' water that is warmed by the Sun and rises high into the atmosphere, condensing in tiny droplets on minute particles of dust.
云是由海洋中的水分被太阳加热蒸发而形成的，这些水分上升到大气中，凝结成微小的水滴，附着于微小的尘埃颗粒。
The soothing, cooling effect is caused by the evaporation of the sweat on the skin.
凉爽怡人的效果是由皮肤上汗液挥发所致。
Struggling with an evaporation of advertising and a downward drift in street corner sales, The New York Times intends to introduce a "metered" model at the beginning of 2011.
为了应对广告的减少和街角销售的下滑，《纽约时报》打算在2011年初引进一种“计量”模型。
When it is short of water, a plant normally USES evaporation as a means of cooling.
在缺乏水分时，植物一般用蒸发作为降温的手段。
Don't over-water your lawn, and do so in the morning, when less evaporation occurs.
灌溉草坪的时候不要过度用水，并且在早晨灌溉，以减少水汽的蒸发。
Short rainy seasons demand water storage, ideally in places where evaporation is low.
短暂的雨季需要储水，理想的是在蒸发低的地方进行储水。
Clothing that is impermeable to water prevents the evaporation of sweat from the skin.
穿着不透水的衣服会阻碍体表汗液的蒸发。
Volcanic heat would drive the chemical reactions, as well as causing lots of evaporation.
火山的热量将驱动化学反应，同时也能引起大量的蒸发。
In older vehicles, you can prevent evaporation by making sure the cap is tightly secured.
对于老汽车，你可以通过检查油箱盖子是否拧紧来避免汽油蒸发。
From the evaporation of water, people know that liquids can turn into gases under certain conditions.
根据水的蒸发现象，人们知道液体在一定的条件下能变成气体。
Lacking an outlet, the Caspian Sea loses water only by evaporation, leading to the accumulation of salt.
由于没有排水口，里海的水量流失只能依赖蒸发，这也造成湖水中盐的积聚。
Lining and covering irrigation canals to avoid ground seepage and evaporation could save huge... [More].
对运河进行内衬和加盖以防止地表渗漏和蒸发，可节省大量的水资源。
Reductions in lake levels here seem to driven by reductions in rainfall rather than increased evaporation.
这里看到的湖泊水位下降似乎是由降雨量下降造成的，而不是由越发增多的蒸发造成的。
Sweating delays the onset of this critical heat buildup by dissipating the excess heat through evaporation.
而通过汗液蒸发，可以散发多余的热量，从而延缓临界温度的到达。
Rainwater is channelled into sand catchments, which serve both to filter it and to protect it from evaporation.
雨水被导入沙砾储水区，这样有两个好处，一是能够过滤雨水，二是能够减少水的蒸发量。
These particles then allowed water molecules to bind together, forming droplets and avoiding re-evaporation.
而这些微粒使水分子结合在一起，形成水滴，防止再次蒸发。
The terraced pools of mineral-laden water at Maras produce salt by evaporation, as they did in the time of the Inca.
通过蒸发的方式，玛拉斯人好像印加时期的先人一样，将梯田浅水池里富含矿物质的水变成盐。
The terraced pools of mineral-laden water at Maras produce salt by evaporation, as they did in the time of the Inca.
通过蒸发的方式，玛拉斯人好像印加时期的先人一样，将梯田浅水池里富含矿物质的水变成盐。
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