Even celery has been loosely linked to mental acuity.

甚至芹菜已经被松散地与脑力敏锐度联系在一起。

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I hope you haven't accepted the notion that a slowdown in mental acuity is an inevitable part of getting older. It's not!

我希望你不要接受这么一种主张：随着年龄增长头脑的敏锐性必然会减弱。

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Scientists do not have all the answers, but studies of older people who have maintained their mental acuity provide some clues.

科学家无法提供所有答案。不过，从对一些保持头脑敏锐地老年人的研究中可以找到一些线索。

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You get the idea that everything arises from the extraordinary mental acuity or spiritual insight of an author and that what needs to be understood about literature is the genius of its production.

你发现一切,都源自这些作者的敏锐头脑和深刻见解,关于文学，你需要理解的,是这些天才的作品。

耶鲁公开课 - 文学理论导论课程节选

Slim says it tracks his advancing age--and his declining mental acuity.

FORBES: Magazine Article

Although one of the other 11 members of the jury was, improbably, also a historian of science, two and possibly a third showed the mental acuity of fireplugs.

ECONOMIST: American juries

In particular, you would need to measure their ability to perform different tasks in a standardized way, such as walking on a treadmill, ability to lift weights, mental acuity etc.

FORBES: Getting The Benefits Of Red Wine From A Pill? Not Likely.