网页
需要时在应用内打开网页参考，然后立刻回到学习。
When you do need the web — a reference, an example, something outside the course — you can open it inside the app and return to exactly where you were, without losing your place in the chapter.
需要时在应用内打开网页参考，然后立刻回到学习。
When you do need the web — a reference, an example, something outside the course — you can open it inside the app and return to exactly where you were, without losing your place in the chapter.