如果太多的火山热量被释放，火山口的浮冰群将会完全消失并且洞和几年前的雪一起消失。
If too much volcanic heat is discharged, the crater's ice pack will melt away entirely and the caves will vanish along with the snows of yesteryear.
它们常常把小海象留在浮冰上，以避免陆地上拥挤海象群的碰撞。
They often keep their young on ice floes to avoid the crush of the jostling walrus crowds on land.
一群海豹躺在阿拉斯加冰川湾谬尔冰川内的一块浮冰上休息。
A group of seals rests on floating ice in front of muir glacier in glacier bay, Alaska.
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