"One of the benefits is it's a relatively inexpensive renewable material that's readily available."

VOA: special.2009.10.05

And also because, and this is also the reason why the power points are always available, I want you to be engaged in the material.

另一个原因，之所以提前提供幻灯片，我希望你们能充分理解材料。

哈佛公开课 - 幸福课课程节选

When we think of the kinds of examples of material machines that we've got available to us in the fourteenth century, I try to imagine what would somebody in the fourteenth century think to himself or herself when he entertains the possibility that a plant might just be a machine?

当我们回想14世纪时期的,各种机器,我试着想象,一个生活在14世纪的人,他,或她,在面对一株植物可能,只不过是一台机器的观点时会怎么想

耶鲁公开课 - 死亡课程节选