喺重新定義「全自動區分電腦同人類嘅圖靈測試（簡稱 CAPTCHA）」之後，每一次嘅人手輸入都係幫緊數碼化圖書，Luis von Ahn 於是諗點樣利用互聯網每個人嘅小小力量來實現巨大嘅價值。喺 TEDxCMU 上，佢講解佢雄心勃勃嘅大計劃 Duolingo 點樣唔使錢幫千萬人學語言，同時又借助佢哋力量快而準咁翻譯網頁。

大規模在線協作

Ordinary internet tasks like typing CAPTCHAs can be redirected to solve real-world problems on a global scale. By reimagining CAPTCHAs, over 750 million people have collectively helped digitize millions of books, one word at a time. The same principle now powers Duolingo, where language learners simultaneously translate the web for free, making knowledge and education more accessible. Crowdsourcing small efforts unlocks achievements once thought possible only with huge resources.

Turning Everyday Effort Into Massive Online Collaboration Power

*TED en Español podcast*

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Luis von Ahn: 大規模在線協作