With the increase of train speed, the frost hazard of subgrade engineering in seasonally frozen soil becomes more and more serious.

随着列车速度的不断提高，季节冻土区路基工程的冻胀问题也越来越突出。

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Meantime there are two kinds of weather of the cold wave, one of them is expressed as rainy or snowy day near the front, another is successive clear days result in severe frost hazard.

在云南存在锋面附近的雨雪天气和造成重霜冻的晴好天气两种寒潮天气过程。

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There would be a widespread hard frost, with ice a hazard, on Wednesday night while snow expected for Scotland and northern England on Thursday morning would bring the potential for disruption.

BBC: Snow leads to crashes and delays in parts of UK