the limit beyond which frost does not form; esp. a depth in the ground below which frost does not penetrate.
| 单词 | θ7969 |
| 释义 | the world > the earth > weather and the atmosphere > weather > cold weather > [noun] > freezing or frosty weather > limit of frost (1) frost line1850 the limit beyond which frost does not form; esp. a depth in the ground below which frost does not penetrate. |
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