但是在过去的20年里，因为产前检查的普及问题爆发了。

But in the last 20 years, the problem has exploded thanks to the spread of prenatal scans.

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普及卫生意识不仅包括让人民知道问题，而且要提出解决方案。

Awareness does not only entail informing people of the problem, but also presenting them with solutions.

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近年来XML数据库日渐普及，就是因为解决了这类问题。

XML databases have been gaining popularity over the years because they address this kind of problem.

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So iodine deficiency was a real problem and then salt started getting fortified with iodine, and that really corrected a lot of those deficiency problems around the world.

碘缺乏曾经是个大问题,随着加碘盐的逐渐普及,使得全球诸多碘缺乏问题得到了改善

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选