0 to waste time trying to create something that someone else has already created
1 to waste time learning how to do something when it is already known how to do it:
中文繁体
重複發明, 無謂地重複, 浪費時間做無用功…
More中文简体
重复发明, 无谓地重复, 浪费时间做无用功…
MorePolski
odkrywać Amerykę, wyważać otwarte drzwi…
MoreTürk dili
önceden bilinen aynı şeyleri yaparak zaman kaybetmek…
Moreрусский язык
изобретать колесо…
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