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2025年5月17日 星期六

duol



https://invest.cnyes.com/usstock/detail/DUOL


Duolingo Inc is a mobile learning platform to learn languages and the top-grossing app in the Education category on both Google Play and the Apple App Store. It has three predominant sources of revenue; time-based subscriptions, in-app advertising placement by third parties, and the Duolingo English Test.

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