To prevent damage from repeated freeze-thaw cycles, the bottom of the foundation must be below the frost line.

为了防止反复冰冻解冻循环的损害，地基的底部必须在霜线以下（此处的土壤不受地表冰冻的影响）。

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Ten mile pinghu frost all over the sky, inch black hair sorrow, for on line looking at each other, only envy mandarin duck not envyimmortal.

十里平湖霜满天，寸寸青丝愁华年，对月行单望相互，只羡鸳鸯不羡仙。

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The experimental results indicated that the frost layer grew very slowly with the effect of ultrasound, and the frost layer composed by "frost line" was more inerratic.

研究显示，冷表面霜层在施加超声波作用后仅有少量生长，霜层分布相对规则，由一簇簇“霜线”组成。

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The great Robert Frost has a line about that.

伟大诗人Robert，Frost就写过这样一句话：

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"If you're in the colder climates, then one has to put the foundation walls several feet deep to get below the frost line, " Kiesling said.

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But in the Southwest, where the frost line is only about 18 inches below ground, the added incremental cost of digging out a basement would be far steeper, said the Texan.

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Ulster surged into a 21-0 half-time lead with their second try in the 32nd minute when after a line-out take by Frost, the pack drove the big lock over the line.

BBC: Edinburgh 21-27 Ulster