Necessity is the mother of invention.
需母。
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It is said that necessity is the mother of invention.
有说，需要是发之母。
His story is proof that necessity is truly the mother of invention.
他的故事证，需要确实是发之母。
No man could more verify the truth of these two maxims, " That nature is very easily satisfied;" and, " That necessity is the mother of invention" .
没有更证实这两条格言的真实性，“天性是很容易满足的；”并且，“需要是发之母”。
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详细解释
母。
说，
，
更证实这两条格言的真实性，“天性
