4 ms·
That reminds me of the TED talk [0] Luis von Ahn did when he announced duolingo. [0] https://www.youtube.com/watch?v=-Ht4qiDRZE8 https://www.youtube.com/watch?
by Zhyl 9y ago
That reminds me of the TED talk [0] Luis von Ahn did when he announced duolingo.
[0] https://www.youtube.com/watch?v=-Ht4qiDRZE8 https://www.youtube.com/watch?v=-Ht4qiDRZE8