The results show that the upper level part of the double cold front may be merged in the movement under the effect of deformation factor.

结果显示，在变形场作用下，双冷锋在移行过程中会发生上层锋合并的现象。

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The same brutal Arctic cold front that's already delivered subzero temperatures across the upper Midwest and Northeast is forecast to bring ice and freezing rain to the South and Mid-Atlantic states on Friday.

CNN: Fierce cold 'a constant blast in the face' for many