等大球最紧密堆积使其在地球各层圈中晶体结构保持恒定。
It maintains the same crystal structure in all layers of the earth.
包装一箱桔子或堆积等大球体的最紧密方法是什么？
What's the most compact way of packing a crate of oranges - or any congruent spheres for that matter?
包装一箱桔子或堆积等大球体的最紧密方法是什么？
What's the most compact way of packing a crate of oranges - or any congruent spheres for that matter?
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