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原文

With obesity a factor in Covid-19 vaccine eligibility, many Americans are scrambling to find out their body mass index, or BMI.

But experts say the meaning behind those numbers -- and how to lower them -- isn't always so clear-cut.

The US Centers for Disease Control and Prevention lists obesity as an underlying medical condition, and defines it as someone who has a body mass index of 30 or higher but less than 40. Having a high BMI, however, doesn't necessarily mean you're unhealthy.

語言點

1. eligibility n. 有資格，合格

· eligible adj. 有資格的

2. scramble v. 爭搶，爭奪(If you scramble, you move quickly to do sth. often before somebody else does. )

· Big companies like BAT are scrambling for skilled workers.

像BAT這樣的大公司都在爭搶人才。

· People are scrambling to buy a cup of drink.

大家都排隊爭搶一杯飲料。

3. underlying adj. 潛在的

· underlying cause/problem 潛在的原因/問題

· To stop a problem you have to understand its underlying causes.

要解決問題，你得了解潛在的原因是什么。

4. doesn't necessarily mean 并不一定意味著……

· Cheap doesn't necessarily mean bad in terms of goods.

價格便宜并不一定就質量差。

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