On August thirty-first, the Flying Cloud sailed into San Francisco Bay.

VOA: special.2009.12.23

So at first this might seem very limited in terms of functionality for you but when I first logged in to that cloud, recall that my prompt looked like this.

从字面上来看，好像,看不出来它是干嘛的，但是当我第一次登录到,“云“，好像是这样的提示。

哈佛公开课 - 计算机科学课程节选