He is a man of keen observation.

他是一个观察力敏锐的人。

youdao

He is a responsible scout with keen observation.

他是个眼力敏锐的侦察员，而且很负责。

youdao

It is by keen observation that man acquires knowledge.

通过敏锐观察，人类就可以获得知识。

youdao

That's a keen observation.

很敏锐的观察力。

哈佛公开课 - 幸福课课程节选

Seinfeld's keen observation about everything and nothing couldn't come at a better time -- his five-borough New York City comedy tour kicks off tomorrow.

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And to one level of accuracy Keen is correct in this observation.

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It's a rare writer who can combine keen, grounded, psychological observation with visionary headiness, who can make you feel a character's acute cultural dislocation without ever stooping to lectures -- and an even rarer writer who can meld all of these elements into a sinuous, powerful whole.

CNN: 'Thirst' marks debut of 'major talent'