【英语时差8，16】看看自己是否超重？

 BMI stands for Body Mass Index, and it's a way to estimate whether or not an adult is over or under weight for his or her height. No equipment is necessary. You can figure out your BMI at home with a calculator. You multiply your weight in pounds by the number, 705. Then you divide that number by your height in inches squared. The final number is your Body Mass Index.   A healthy BMI is considered to be anything between eighteen and just under twenty-five. If your number is twenty-five or higher the BMI estimates that you're overweight. Over thirty, and the BMI says you're obese¹. Keep in mind though that these standards have met criticism for being too conservative.

Though the BMI can be a good method for estimating whether one is overweight, it is not at all perfect. 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.

The most common criticism of the BMI is that it cannot tell the difference between fat and muscle. Because muscle is denser² than fat an athlete's BMI might indicate that he is overweight, but that extra weight might be composed more of muscle than fat. But it's excess fat that typically puts people at health risks. There is no perfect method for figuring out your body fat, but the BMI gives a good estimate.  

1 obese   

adj.过度肥胖的，肥大的

参考例句：

• The old man is really obese,it can't be healthy.那位老人确实过于肥胖了，不能算是健康。
• Being obese and lazy is dangerous to health.又胖又懒危害健康。

2 denser   

adj. 不易看透的, 密集的, 浓厚的, 愚钝的

参考例句：

• The denser population necessitates closer consolidation both for internal and external action. 住得日益稠密的居民，对内和对外都不得不更紧密地团结起来。 来自英汉非文学 - 家庭、私有制和国家的起源
• As Tito entered the neighbourhood of San Martino, he found the throng rather denser. 蒂托走近圣马丁教堂附近一带时，发现人群相当密集。