暖空气是指位于高温区的空气。暖空气一般为高压。经常和冷空气交锋。
突然，他们的巢里出现了一个洞。冷风从洞里吹进来，把巢里的暖空气吹走了。
Suddenly, there appeared a hole in their nest. The cold wind blew in through the hole and got away the warm air from the nest.
重力令冷空气下沉，暖空气上升。
如果没有这些大量冷却的海冰，被带到北极的暖空气可以比以前更深入渗透到内陆。
Without those masses of cooling sea ice, warm air brought to the Arctic can penetrate further inland than it ever did before.
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