BMI is body mass index: a simple number from your weight and height, used as a rough map of whether a person is underweight, in a middle band, overweight, or obese on a chart. The usual sum is weight in kilograms divided by height in metres squared.

BMI這個詞 is body mass index是body mass index(身體質量指數)的縮寫: a simple number from your weight and height是根據你的體重和身高算出來的一個簡單數字, used as a rough map of whether a person is underweight, in a middle band, overweight, or obese on a chart用來大概判斷一個人在圖表上是過輕、中等範圍、過重、還是肥胖。the usual sum is weight in kilograms divided by height in metres squared一般的算法是體重(公斤)除以身高(公尺)的平方。

Clinics, gyms, and school health checks love it because it is quick.

clinics, gyms, and school health checks love it診所、健身房、學校健康檢查都很愛用它 because it is quick因為它算起來很快。

The tidy story is that certain bands mean healthy; the messier truth is that BMI cannot see the difference between muscle and fat, and it was built on old averages, so a stocky athlete can look overweight on paper, and two people with the same BMI can be in very different shape.

the tidy story is that certain bands mean healthy簡化的說法是某些範圍就代表健康; the messier truth is that BMI cannot see the difference between muscle and fat但比較複雜的事實是,BMI沒辦法分辨肌肉和脂肪的差別, and it was built on old averages而且它是根據以前的平均值訂出來的, so a stocky athlete can look overweight on paper所以一個體格結實的運動員在數字上可能看起來過重, and two people with the same BMI can be in very different shape而兩個BMI一樣的人,體態可能完全不同。

Some East Asian guidelines use slightly lower cut-offs than older Western charts, because risk can show up at a smaller number.

some East Asian guidelines use slightly lower cut-offs than older Western charts有些東亞地區的指引會用比舊的西方圖表稍微低一點的切點, because risk can show up at a smaller number因為風險在比較小的數字時就可能出現。

People stretch the letters in conversation — What’s your BMI? — as if it were a full health report. It is only one clue. Said as letters: B-M-I.

people stretch the letters in conversation在對話裡,人們會把這幾個字母拿來問—— What's your BMI?『你的BMI多少?』——as if it were a full health report好像它是一份完整的健康報告一樣。it is only one clue但它其實只是一個線索。said as letters唸法是一個字母一個字母唸: B-M-IB-M-I。