Warm water from the top of the ice is boring its way down, and warm air from below the mountain actually rises up, gets into the cave, and melts the ceilings back taller and taller.
冰体顶部的温暖水流 渐渐凿入冰体。 吹过山的暖风自然上升， 进入岩洞。 融化岩洞的天花板，使它越来越高。