“蠕虫和富裕”理论是“卫生假说”的阴阳两个方面。也许我们真该多接触点寄生虫，来平衡一下我们越来越少接触细菌和病毒的状况。

A "Worm vs. Wealth" theory is the Yang to the Yin of the Hygiene Hypothesis: Maybe we need more exposure to parasites to balance our reduced exposure to bacteria and viruses.

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同时，孩子们变得普遍不好动，与外界接触的时间也越来越少。

It adds they are also physically less active and spend less time exploring their environment.

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这样他们接触到当地的语言的机会就会越来越少。

Then the chance they can reach local language is very few.

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