You build a steel plant with a capital cost of several billion dollars.

你可以建立一个钢铁的地球,只要几十亿元的投入。

麻省理工公开课 - 固态化学导论课程节选

In terms of cost to institute this, the upfront cost to build classrooms, to accommodate this kind of structure, we need two classrooms that hold 170 students a piece to do this.

关于建这个项目的成本，最主要的就是搭建教室，使之适应这种教学模式，我们需要两间能装170人,的教室来上这种课。

麻省理工公开课 - 媒体、教育、市场课程节选