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hoarfrost

n.霜,白霜

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hoarfrost为短语/超纲词汇

hoarfrost


n[U]formal
[Date: 1200-1300; Origin: hoar 'gray, white' (11-20 centuries) (from Old English har) + frost]
a thin layer of ice that forms on objects outside when it is very cold
= frost
 A light hoarfrost covered the fields.