狼牙堡位于美国科罗拉多州旅游胜地维尔，冰瀑现象只有在特殊情况的冬天才会产生——全球暖化是不是让其处于更加危险的境地了呢？

The Fang, near the resort town of Vail, Colorado, only forms during exceptionally cold winters – does Global Warming make it an endangered species?

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我住在阿拉巴马州，家中有一个暖器。

I live in Alabama and have a heat pump.

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