And they were weakened as a result, and so the Spaniards, even in fewer numbers, were able to conquer.

最终他们变得很虚弱,所以这群西班牙人,尽管数量很少,还是取得了胜利

耶鲁公开课 - 生物医学工程探索课程节选

You rotate the letters by a deterministic amount, by a fixed number of steps so that the end result is actually something that can be reversed.

你用确定的数量旋转那些字母，通过一个固定数量的步骤,这样，最终结果是可以把它,反加密出来。

哈佛公开课 - 计算机科学课程节选