在过去几十年里，这些雪阻止了表层的水温升高得更多，增加了冰原的容积，并反射了太阳光。
And for the last few decades, that snow kept surface waters from warming even more, added bulk to sea ice, and reflected sunlight.
克鲁特森博士提出并认可了一项较为实际的方案，那就是在大气层的上层散布大量的微小粒子来反射太阳光线。
A less exotic approach, endorsed by Dr Crutzen, would be to spread tiny particles in the upper atmosphere to reflect the sun's rays.
固定反射镜系统存在缺陷，它不能循导太阳光以使其得到充分利用，并且有时会转移亮光的路线并产生阴影。
Fixed-mirror systems have drawbacks, however, they cannot track the sun to optimize performance and sometimes distracting patterns of lines of bright light and dark shade are formed.
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