课程保留与维护 Content Access

在课程开课后，你需要在规定的时间（课程有效期 + 课程宽限期）内通过全部项目，并完成毕业流程，获得证书，则在课程有效期结束后，自动获得为期12个月的课程视频和文字内容的继续访问权限便于回顾和复习，该期限起算时间为课程有效期结束后次日开始，课程的视频和文字内容为购买时的版本。如果你未能在宽限期届满时达到毕业条件，你将会失去课程内容访问的权限，需要重新付费才能再次加入课程。想要了解更多，请见官方详细说明。

All projects should be completed by deadline (term period + extension period) before you could receive the graduation certificate. After successful graduation, you will have extended access to a static version of the classroom content of your Nanodegree program for 12 months. The 12-month period starts the day after your applicable Nanodegree program ends. The static content will be the version at the time of your purchase. However, if you fail to graduate by the extension period, you will no longer have access to classroom contents, including its static version. You will have to re-purchase the program before continuing your progress and completing the term. For more information, please visit here.

课程的维护 Content Refresh

在纳米学位课程学习过程中，如果你发现诸如内容错误、翻译不准确、失效链接等问题，可以点击页面右上角“发送课程反馈”。但课程内容和实战项目以报名时为准，优达学城可能根据课程开发计划、相关技术的发展、以及本地化需求对课程内容和实战项目进行不定期更新。优达学城对课程内容和实战项目有最终解释权。

If you have any comments or notice any errors in your Nanodegree program or course content, you can submit content feedback. Program contents and projects will be the version at the time of your purchase, unless updated at some later time to include latest technologies, course developments or localizations etc. Udacity reserves the right to amend and not amend course contents and projects.

后续内容将以全英文形式展开，祝学习愉快！
The subsequent lessons will be taught in English. Get started now and have fun!

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