crystalline or granular snow, especially on the upper part of a glacier, where it has not yet been compressed into ice
(冰川上部的)粒雪,万年雪。
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firnn.粒雪;万年雪
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firmadj.坚硬的;结实的;坚信的;坚定的;牢固的;稳固的;确定的;明确的;严格的;强有力的
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firen.火;射击;开火;炮火;火灾;热情;激情;光亮;光辉;敌意
"mid 19th cent.: from German, from Old High German