And if they do, it can be very expensive. So we see unused space as a great place to grow food that will make it more accessible for people."

VOA: special.2010.07.06

Moreover, you might get hit by an illness and then you could be in desperate trouble that you will die unless you get some kind of emergency care, which might be very expensive.

还有，你可能染上重病,并且深陷绝境,以致你会因此而死去,除非你能获得异常昂贵的，紧急护理。

耶鲁公开课 - 金融市场课程节选

I think so. But video phone has been very hard to achieve. It's either been to be expensive, or too crowded, or can we use the internet to finally introduce video phone and this is different from video on-demand.

我也这么认为，但视频电话要成功很困难,它要么很贵，要么很拥堵，或者我们是否可以使用互联网引入视频电话,这与随需视频是不同的。

麻省理工公开课 - 媒体、教育、市场课程节选