The protein and fat in the peanut butter provide a good start to the day, while the apple and the quercetin it contains provide fiber and protection against some cancers and heart disease.

花生酱中的蛋白质和脂肪为新的一天打造很好的基础，而苹果及其富含的栎精则充满纤维，并保护身体免收癌症和心脏疾病的侵害。

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By itself, each would be inadequate. Together, however, they offer enough protection-and have the advantage that it is much harder for a disease to defeat four or five separate defences than just one.

每个单独防御本身是不够的，但是合在一起，它们就能提供足够的保护——并且还有这样的优点：对病害来说，突破四至五层防御比一层要困难的多。

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Most of the universal vaccines under development do not even try to provide protection against influenza type B. They focus on type A, which tends to cause more severe disease and pandemics.

大多数正在研制的通用流感疫苗，甚至没有提供B型流感病毒的预防。 科学家们把重点集中在了A型流感上，因为它往往会造成更严重的疾病和流行病。

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If I happen to have some other infectious disease, then not only would you passing the protection to smallpox, but you'd be passing that disease among the population as well.

如果正好还有其他传染病,那不仅会传播对天花的免疫能力,也在人群中传播其它传染病

耶鲁公开课 - 生物医学工程探索课程节选

And they did this by taking-- they recognized that somehow, if you had a mild exposure to the disease, your body could then develop protection against more severe forms of the disease.

他们通过用,他们通过某种方式意识到,如果较轻微地得过这种病,你的身体会发展保护机制,来抵挡更为严重的疾病

耶鲁公开课 - 生物医学工程探索课程节选

An important one was protection from disease, suspected to be a consequence of the increased risk of infection that living in settlements brings.

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"Whether that has anything to do with protection against disease has not been proven, " says Kevin Ault, a professor of obstetrics and gynecology at Emory University who consults for both Merck and Glaxo.

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Only then could doctors truly point to better dental care as protection against heart disease.

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