The slush is compacted by an unknown mechanism, and solid, bubble-free ice is formed from water high in soluble organic substances.
半融雪通过一种未知的物理过程被压实，而固态、无气泡的冰是由富含可溶性有机物的水形成的。
The IceCube observatory sits deep underneath the South Pole and has been built in a cubic kilometre of perfectly clear, bubble-free ancient ice.
冰立方天文台身处南极点地下深处一块巨大的、纯净的、无气泡的远古冰块中。
The IceCube observatory sits deep underneath the South Pole and has been built in a cubic kilometre of perfectly clear, bubble-free ancient ice.
冰立方天文台身处南极点地下深处一块巨大的、纯净的、无气泡的远古冰块中。
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