陆上食物是非常有限的，根本没有什么能与一只海豹所能给北极熊提供脂肪和能量相比。
Food onshore is very limited and there is simply nothing comparable to a seal that provides a polar bear with fat and energy.
人们对食物的喜好并没有什么秘密：糖、盐和脂肪，而这些都会令人上瘾。
There's not much secret about what people like in food: sugar, salt and fat, which have an addictive quality.
“日本的研究还表明鲸鱼的脂肪层也变薄了——虽然还没有达到营养不良的地步，却也足以说明食物数量的减少”，格勒佛说。
"Japanese research has even shown that the fat layer on whales down there has decreased-not to the point of malnutrition, but suggesting a decreased access to food," Glover said.
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