这盘菜够四个挨饿的人吃。
乍一想，这似乎不合常理：我们靠吃饭获得能量来维持生命，要是终年挨饿，我们以何维生？
The idea is counterintuitive: If we eat to live, how can starving ourselves add years to our lives?
但当冰层开始融化时——就像近年来已经发生的情况一样，这主要归咎于气候变暖——北极熊可能会忍饥挨饿，逐渐死亡。
But when the ice begins to melt - as it has in recent years, thanks largely to warming - the bears can starve and die.
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