Submitted by e-mail by 5 p.m.

东部标准时间下午五点前通过电子邮件提交。

麻省理工公开课 - 固态化学导论课程节选

> So this was a Scratch project submitted by one of last year's students.

>，这是由去年一个学生完成的,一个Scratch项目。

哈佛公开课 - 计算机科学课程节选

Final question Tom, and this is from a viewer who send in the question by Twitter,to be submitted to you.

最后一个问题，这是一个观众的提问,通过twitter网站，提交给你。

斯坦福公开课 - 经济学课程节选