Protein and carbohydrate have 4 calories per gram, per unit weight.

每克每单位重量蛋白质和碳水化合物产生4卡路里。

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Next every kilogram and every gram of weight that is sent to space has already been precisely calculated and treasured.

其次，送入太空的每一公斤甚至每一克重量，都是精打细算、十分珍贵的。

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At supermarkets here, a 1,000-gram bag of quinoa, just over two pounds, costs the equivalent of $4.85, compared with $1.20 for a bag of noodles the same weight and $1 for a bag of white rice.

在这儿的超市里，1000克一袋的藜麦售价要2英镑多一点，大约相当于4.85美元，对应地，同样重量的一袋面条价格是1.20美元，一袋精米价格是1美元。

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Protein and carbohydrate have 4 calories per gram, per unit weight.

每克蛋白质或碳水化合物产生4卡

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

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