There's no company that's making smallpox vaccine anymore because there's no reason to make smallpox vaccine, because nobody would buy it, right?

没有公司还生产天花疫苗,因为没有人购买天花疫苗,因此早就没有理由继续生产它了,对吧

耶鲁公开课 - 生物医学工程探索课程节选

While China is going to continue to buy things, it doesn't mean they're going to buy them from us necessarily even though the dollar has gone down a great deal Student: Thank you. This is my last question.

虽然中国还将会继续购买原产品,但那并不意味着他们必须得从我们这买,即使美元已经,大幅度地贬值了,学生：谢谢，这是我最后一个问题。

耶鲁公开课 - 金融市场课程节选