但也有人发现，一个人略高的平均身体质量指数，在他年老时对大脑有好处。

But others have found that having a slightly higher than average body mass index when one is very old is good for the brain.

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研究证据表明，相同的身体质量指数，非裔美国人的死亡风险较亚洲人低。

She said evidence suggests that for the same BMI level, African-Americans might have a lower risk of death and Asians a higher risk.

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避免癌症，人应该做到的最重要的事之一就是维持身体质量指数(BMI)在21与23之间。

One of the most important things a person can do to avoid cancer is to maintain a body mass index (BMI) of between 21 and 23.

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