另外，我们利用技术，将他的教学材料同步呈现在，播放录像的窗口边。

And we used the technology that allows us to synchronize his teaching materials beside the window where the video was playing.

youdao

And we used the technology that allows us to synchronize his teaching materials beside the window where the video was playing.

另外，我们利用技术,将他的教学材料同步呈现在,播放录像的窗口边。

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