因为葡萄糖是神经元活动的能量来源，所以大脑中的短暂的葡萄糖低浓度水平会向胃发出信号，让人赶快往嘴里塞食物，纵然能量其实只消耗了九牛一毛。

And because glucose fuels the neurons, a transitory low level in the brain may signal the stomach to get the hands to fill up the mouth, even though the energy actually spent has gone up just a hair.

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当工厂经理毛玲琳递给她薄薄的一沓100元钞票时，她笑了。

She beams as factory manager Miao Linglin hands her a thin stack of 100 yuan notes.

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马丁放下信，在心里算了一道算术题，发现一毛五乘以六万是九千元。

Martin laid down the letter and worked a problem in mental arithmetic, finding the product of fifteen cents times sixty thousand to be nine thousand dollars.

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