To me, effective instruction merges theory and practice.

对我来说，有效的教学是知行合一的。

But there are many examples of effective online instruction in unlikely places like YouTube streams, Netflix programming, and, believe it or not, Amazon's Twitch.

但也有许多例子证明有效的线上教学会出现在一些不同寻常的地方，比如 YouTube 直播、Netflix 节目，还有令人难以置信的亚马逊 Twitch 中。