This sentence was revised by a translator. Edison’s original words were: None of my inventions came by accident. I see a worthwhile need to be met and I make trial after trial until it comes. What it boils down to is one per cent inspiration and ninety-nine per cent perspiration. Translated: None of my inventions are accidental. When I find a valuable invention direction, I will continue to experiment until I succeed. To put it simply, it is one percent inspiration and ninety-nine percent hard work. (Source: Uncommon Friends: Life with Thomas Edison, Henry Ford, Harvey Firestone, Alexis Carrel & Charles Lindbergh (1987) by James D. Newton, p. 24. Don’t complain about my own translation...) I think if you want When using this sentence in English, it is best to use the original version, otherwise it will be the same as foreigners translating the Tang poems they read in foreign languages ??into vernacular for Chinese people to read, which is neither fish nor fowl.