2 ms·
https://en.wikipedia.org/wiki/Necessity_is_the_mother_of_invention https://en.wikipedia.org/wiki/Necessity_is_the_mother_of_inv...
by js2 5y ago
https://en.wikipedia.org/wiki/Necessity_is_the_mother_of_invention https://en.wikipedia.org/wiki/Necessity_is_the_mother_of_inv...