She also found that multilingualism may help protect against age-related mental decline, such as Alzheimers and dementia.

她还发现掌握多门语言有助于减缓与年龄有关的智力下降，例如可以预防老年痴呆症。

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Researchers like Dr. Kevin Gusciwiecz presented findings that suggested that three or more concussions might be a trigger number and that the risk for Alzheimers, ALS, Parkinsons, premature senility and dementia increased exponentially at that level.

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