cold front: 冷锋

最近两天，随着较强冷空气的逐渐逼近，我国北方大部份地区的温度急剧下降。请看报道：

Residents of North China have to get their heavy woollens out from today with a cold front closing in and temperatures set to drop appreciably¹. Beijingers will feel autumn slipping away with the leaves blown away by increasingly cold winds. Winter will set in by the middle of next month.

Cold front 的意思是"冷锋"，即冷空气气团的前锋部分。Front在气象学中指的是"锋"，也就是冷暖气流的交界处。如：active front（活跃锋），arctic front（北极锋）。此外，"寒流"可表达为cold current.