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795,212,062 results
When technologist Luis von Ahn was building the popular language-learning platform Duolingo, he faced a big problem: Could an ...
10,639,765 views
2 years ago
My Second Channel: @MatchiPoko I stream on Twitch now: https://www.twitch.tv/mattiaspilhede Twitter: ...
6,691,458 views
6 years ago
