杜克大学的研究使用身体质量指数测量肥胖，这是一个体重对身高的比率。肥胖的定义是身体质量指数在30或30以上。
The Duke study measured obesity using body-mass index, which is a ratio of weight to height. Obesity is defined as a BMI of 30 or more.
今天，她说，一半的孕妇超重或过度肥胖，在身高-体重比率，又称作肥胖指数上这被定义为30分或者更高。
Today, she said, half of pregnant women are overweight or obese, defined as a score of 30 or above on a height-weight ratio called the Body Mass Index.
体重指数是体重和身高的比率，通常用于肥胖测量。
BMI is a weight-to-height ratio commonly used in to gauge obesity.
事实上BMI只是一个基于数千个关于身高和体重关系观察的身高体重比率表老外就是这么表达的？
The BMI is really just a height to weight ratio chart that is based on thousands of observations about the relationship between height and weight.
事实上BMI只是一个基于数千个关于身高和体重关系观察的身高体重比率表老外就是这么表达的？
The BMI is really just a height to weight ratio chart that is based on thousands of observations about the relationship between height and weight.
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