As the zero-balanced surface of rainfall, the snowline can be defined as the lower limit of the perennially snow-covered area, and it is a geographic element as important as the tree line, the periglacial line and the soil line.
雪线是降水的零平衡面,作为终年积雪区的下界,是与林线、冰缘线和土壤线等界线同等重要的自然地理区划线。
Finally, combine these three methods to determine the slope length limit of longitudinal ground road under snow and ice conditions.
最后结合上述三种方法确定冰雪条件下地面道路的纵坡坡长限制指标。
And with schools closing in D.C. Maryland, Philadelphia, New York City and Boston, this storm pushed snow removal budgets over the limit.
马里兰、费城、纽约市以及波斯顿的学校都被关闭,这场暴风雪推动了扫雪预算,大大超过限定金额。
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