全球变冷将使空气更难保持海洋蒸发的水分，从而减少降雨量，使更多的地方面临干旱。
Global cooling meant that the air had less capacity to hold moisture from the oceans, leading to fewer rains and more arid climes.
我们在这说的燕窝是由多种雨燕生产出来的，尤其是金丝燕在做巢时会排放一种化学混合物，使空气变冷。
The nests in question here are produced by a variety of Swifts, specifically Cave Swifts who produce the nest by spitting a chemical compound that hardens in the air.
相反也是如此：当冰雪较多时，它就把更多的太阳能反射回太空，使北极变冷，从而形成更多的海冰。
The opposite is also true: When there is more ice it reflects more solar energy back into space, and cools the Arctic down, which leads to more sea ice forming.
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