格言
发表于 2025-4-1 03:35:11
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Coeval
发表于 2025-4-1 09:10:40
Gerhard Weckarriving at the lower mantle and upper core, temperature will reach approximately 5000 K (the temperature of the sun’s surface) and pressure will approach 1 Mbar. Now imagine that, at this point, you take out your polishing apparatus and begin preparing mirror surfaces on surrounding materials, some