名词
中文翻译：空气霜冻
同义词：
['frosty air', 'frosty air例句：1. The cold air froze the ground and made it difficult to walk.（寒冷的空气使地面结冰，行走变得困难。）2. The air was so cold that people had to wear heavy coats to stay warm.（空气非常冷，人们不得不穿着厚重的外套来保暖。）']
例句：
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1. The cold air froze the ground and made it difficult to walk.
寒冷的空气使地面结冰，行走变得困难。
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2. The air was so cold that people had to wear heavy coats to stay warm.
空气非常冷，人们不得不穿着厚重的外套来保暖。
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3. The air frost is a common phenomenon in winter, where temperatures drop below freezing point.
霜冻是冬季常见的现象，当温度降到冰点以下时就会出现。