你可以在网上搜索这些视频，你想放松身心的时候就随时练习。

You can search online for the videos and practice them at any time when you feel like relaxing your body and mind.

youdao

也可以用来轻松地做笔记和网上组件的综合测试，练习和内容更新。

It also allows for easy note-taking and the online component allows for integrated tests, exercises and updates.

youdao

网上教室：在我们的网上教室练习发音，观摩对话，掌握新单词和语法。

Online classroom: Practice your pronunciation, watch a dialogue, or learn new vocabulary and grammar in our online classroom.

youdao

You can see the website if you want to download a copy of this to practice on it.

如果你们想练习的话,可以到网上自行下载。

麻省理工公开课 - 固态化学导论课程节选

Then you have a problem set, which is due on that day, your first problem set, and the problem set is up on the website.

你们到时还要交习题册，这是你们的第一次回家练习，习题册已经上传到网上了。

耶鲁公开课 - 金融市场课程节选