In one remarkable example just a few years ago, a Norwegian backcountry skier was rescued after an accident that left her under ice-cold water for more than an hour.

• 几年前才刚发生了一件令人瞩目的事，有一位挪威滑雪者发生车祸，在冰冷的水中超过一个小时之后，又给救活了。