BMI, the ratio of weight in kilograms to the square of height in metres, is a common, if imperfect, gauge of whether someone is over- or underweight.

体重指数，是指体重（以千克为单位计）与身高（以米为单位计）平方之比。即使有缺点，这一指标也仍是被最普遍采用的检测一个人是否超重的指标。

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BMI, the ratio of weight in kilograms to the square of height in metres, is a common, if imperfect, gauge of whether someone is over- or underweight.

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