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Frost line
"Frost line" in a Sentence (3 examples)
The uninsulated water pipes must be installed below the frost line to prevent them from freezing.
Due to the thin layer of snow on the ground the frost line has penetrated unusually deep this year.
In our Solar System the frost line lies between Mars and Jupiter at about five astronomical units from the Sun.
See also for "frost line"
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Unscramble this word: frostline