Why is it difficult in some cases to produce a vaccine when we've been successful in so many others?

为什么某些疾病的疫苗很难研制,即使我们已经成功生产了很多种疫苗

耶鲁公开课 - 生物医学工程探索课程节选

In many cases, it's less actually here, so.

在很多情况下，这里的东西还会便宜一些。

来自西班牙 - SpeakingMax英语口语达人

Inflation is the most important thing according to many views because the Fed has to guarantee the soundness of the money supply -- and there have been so many cases in history when the central bank allowed debasement of the currency through inflation.

通货膨胀是最重要的事情,根据很多观点,因为美联储必须保证,货币供应的稳固,并且在历史上有太多的例子,当中央银行允许,通过通货膨胀改造货币。

耶鲁公开课 - 金融市场课程节选