But there is real reluctance about the depth and breadth and the length of the commitment,".

VOA: standard.2009.11.16

When you visit the open course website, what you'll see is that a depth and a breadth of materials that's different from what you see on other campus websites.

当你访问开放课程网站时，你会看到既有深度又有宽度的,并且与你在其他校园网站上,看到的不同的材料。

麻省理工公开课 - 媒体、教育、市场课程节选