In fact, I dug up this from a few years ago it was actually pretty fortuitous like the day before one of CS50s lectures the original iPhone was cracked.

实际上，我在几年前,发现了这个，这是相当意外的,就像在一个CS50演讲前一天,我的iPhone，坏掉了。

哈佛公开课 - 计算机科学课程节选

because they fly in to land on our medical center, a few times a day usually.

因为它们飞进来在我们的医学中心上降落，一天通常会有好几次。

学习机械工程 - SpeakingMax英语口语达人