Necessity is the mother of invention.
发明家的铭言是:「需要是发明之母(Necessity is the mother of invention),这也是古谚:「穷则变,变则通的道理。
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在绝大数情况下,需要是发明之母。
In most instances, necessity is the mother of invention.
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如果需要是发明之母,不满足就是进步之父。
If necessity is the mother of invention, discontent is the father of progress.
需要是发明之母。
Necessity is the mother of all invention.
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