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.
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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