In the bunker, where ice crystals have formed on the ceiling in perfect geometric squares, it quickly becomes apparent why it's so difficult to build on permafrost.
在地坑里，冰晶在天花上结成了完美的几何块状。我很快就明白了为什么在永久冻土带上建筑房屋很困难。
In the bunker, where ice crystals have formed on the ceiling in perfect geometric squares, it quickly becomes apparent why it's so difficult to build on permafrost.
在地坑里，冰晶在天花上结成了完美的几何块状。我很快就明白了为什么在永久冻土带上建筑房屋很困难。
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