我们所有素材有95%都是电子书格式的，可以在上面跑。

And we have 95% of all our materials that are in e-book format on that one.

youdao

我们所有素材有95%都是电子书格式的，可以在上面跑。

And we have 95% of all our materials that are in e-book format on that one.

youdao