但是这些气泡只是轻微地使地球变亮，在1%的地球反射率中占不到十分之一。
But these bubbles only lightly brighten the planet, contributing less than one-tenth of 1% of Earth's reflectivity, or albedo.
地球的反射率主要是由云和雪覆盖的部分决定的。
The reflecting power of the earth is primarily dictated by the proportion of cloud and snow cover.
它们增加了地球的反射率，并成为地球全球冰封的基础。
They increase albedo of the Earth and serve as the basis of its global freezing up.
它们增加了地球的反射率，并成为地球全球冰封的基础。
They increase albedo of the Earth and serve as the basis of its global freezing up.
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