How do we make the for-free model?

我们怎么才能做好免费网站？

麻省理工公开课 - 媒体、教育、市场课程节选

In the case of last year we did hand students some code with which they could write programs that talked to Yahoo Finance, finance.yahoo.com, free website.

在去年的情况下，我们给学生提供一些,能用来写程序跟雅虎财经的免费网站交互的代码,即finance。yahoo。com，一个免费的网站。

哈佛公开课 - 计算机科学课程节选