The conventional view is that carotenoids are meaningful because they are rare: healthier males can forage for more of the pigments than can their inferior counterparts.

传统的观点认为类胡萝卜素之所以有意义，是因为它们很罕见：健康的雄性可以比它们的同类寻找到更多的色素。

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With fresh air to breathe, less crowded living conditions, and more chances to take part in physical exercise, children in the country are usually healthier than those in the city.

乡下的孩子有新鲜的空气可以呼吸，生活环境不那么拥挤，有更多的机会参加体育锻炼，所以他们通常比城市中的孩子健康。

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Students do not merely benefit while at university; studies show they go on to be healthier and happier than non-graduates, and also far more likely to vote.

学生不仅在大学期间受益；研究表明，比起非大学毕业生，他们更加健康快乐，也更可能去投票。

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Over the years, Americans have become more obsessed with weight loss, but not much healthier as more than one-third of U.S. adults are obese.

CNN: Why isn't there a safe weight-loss pill?

While more people aging with HIV are living healthier, more productive lives than ever before, growing older with HIV may present multiple medical challenges.

WHITEHOUSE: National HIV/AIDS and Aging Awareness Day: Recognizing the Challenges of Growing Older with HIV/AIDS | The White House

Interestingly, Lavigne-Delville notes that women are more excited about junk food brands investing in healthier alternatives than they are about the brands more commonly associated with health and wellness.

FORBES: Healthy Fast Food? Women Are Buzzing About McDonald's