n. rarefaction ; attenuation
当然，要解决冰川年轻化和稀薄化的问题，我们需要的是寒冬而不是酷夏。
The problem with ice being younger and thinner, of course, is that deeper cold is required each winter to build it up, and less warmth is required each summer to melt it.
露水升化之后，在旷野的地面上，留下稀薄的碎屑，稀薄得好像地上的霜。
And when it had covered the face of the earth, it appeared in the wilderness small, and as it were beaten with a pestle, like unto the hoar frost on the ground.
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