为了减掉一磅，你得通过锻炼或生活机能消耗，大概3600卡里路。

To lose a pound, you have to burn, through exercise or life functions, about 3600 calories.

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如果你每天的饮食减掉250卡，两个星期你就能减掉一磅。

If you cut 250 calories from your daily diet, you could lose that pound in about two weeks.

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国家卫生研究所（美）的说法是，每天少摄入500卡热量，一周即可减掉一磅体重。

The National Institutes of Health states that if you eat 500 fewer calories every day, you will lose a pound each week.

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