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Formerly a solid mass that melted and refroze at its edges , it is now thinner , more fractured , and so more liable to melt .

以前融化和冻结仅发生在冰块的边缘，但是它现在变得更薄，更易破裂，并且更倾向融化。

Most believe the footprints are nothing more than ordinary animal tracks , which had been made larger as they melted and refroze in the snow .

大多数人相信这些脚印只是普通动物的足迹，这些足迹由於在雪里融化再结冰而变大了。

It is possible that water remained frozen for most of the time , was occasionally released and quickly refroze .

或许水在大多数时候是冻结的，只是偶尔流出又快速冻结。