如果大马哈鱼成为海岸边熊的主要脂肪和蛋白质的来源的话，一头雌性熊就可以大吃特吃大马哈鱼，以储存更多的脂肪准备越冬，同时也在潜在地增加她的产仔率。

If salmon are a coastal bear's primary fat and protein source, a successful female can feast on salmon to store more fat for winter, potentially increasing the number of cubs she can produce.

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与伊索寓言中的蚂蚁很像，具有节约基因的人——英明，有人可能会这么说——通过摄入并储存多于他们消耗的热量，为艰难时期做好准备。

Rather like the ant in an Aesop's fable, people withthrifty genotypes--wisely, it might be argued--prepare for hard timesby consuming and storing more calories than they expend.

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对那些在美联储存有准备金的机构来说，超额准备金基本上等同于中期国债。

For institutions that can hold reserves at the Fed, excess reserves are essentially equivalent to Treasury bills.

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