BMI
noun [ S ] uk/ˌbiː.emˈaɪ/ us/ˌbiː.emˈaɪ/
体重指数（body mass index 的缩写）
abbreviation for body mass index: a measurement of someone's weight in relation to their height
Adults who have a BMI of 30 or higher are defined as obese. 体重指数达到或超过30的成年人被定义为肥胖。