The proper study of mankind is man.

研究人类最合适的对象是人。

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Enlightenment history framed a proper study of mankind to ensure a better future.

启蒙时期的历史通过对人类本身的研究，创造了一个更好的未来。

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As with other regulatory requirements, it should be addressed methodically, via proper study and analysis.

与其他法规的要求，应该给有条不紊，通过适当的研究和分析。

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First you need to drum up support for the idea, then you need to persuade someone to fund a proper study.

BBC: M11, A14, A11, A47 and A1 road schemes move forward

The proper study of mankind was indeed man: not in his politicking, warring or banking, but naked, painting his body, hunting bears, snaring birds.

ECONOMIST: Claude L��vi-Strauss

To learn a musical instrument, you need to put in a lot of work 10, 000 hours is a number that is often cited and to do a proper study, you'd need a reasonably large sample of adult novices with sufficient commitment.

WSJ: How a Middle-Aged Dog Learned New Guitar Tricks