最适合用来构建X事物的Duolingo是什么?

2作者: Lil-Finance-Bro大约 2 小时前原帖
Duo 开辟了一种新的习惯养成和学习方式,换句话说,选择是无穷无尽的……<p>还有什么是可以获得的/需要的?
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Duo opened up a new way of habit building and learning, that said, the options are endless...<p>WHat is still up for grabs&#x2F;Needed?