名词
中文翻译：Unknown
同义词：
['frozen fog', 'frost']
例句：
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1. The hoar-frost on the windows is a sign of winter's arrival.
窗户上的霜是冬天到来的标志。
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2. The farmer had to clear the hoar-frost from his fields before sowing.
农民在播种前必须清除田地上的霜。
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3. The hoar-frost made it difficult for the animals to find food.
霜冻使动物难以找到食物。