And the books cannot be placed on more than one device, so they are not easy to share.

VOA: special.2009.09.03

So obvious and so easy to be quench't And not as feeling through all parts diffus'd That she might look at will through every pore?

如此显露，如此易受损伤,为什么不像触觉，分布在全身各部,可以通过每一根毛细管去自由观看？

耶鲁公开课 - 弥尔顿课程节选

And it turns out not to be so easy.

实际上这并不怎么简单。

麻省理工公开课 - 热力学与动力学课程节选