So, these things here that you have in your hand, is the results of my spontaneously going to staples before class.

你们手头上东西，都是我们在上课前买到的。

哈佛公开课 - 计算机科学课程节选

How is your immune system going to recognize that this virus is there causing bad results if it's living inside of a cell and doing all its business inside a cell where antibodies can't get to it?

你的免疫系统怎样才能识别,作恶多端的病毒呢,如果它隐藏在细胞中进行繁殖,而抗体又无法进入细胞,那该怎么办

耶鲁公开课 - 生物医学工程探索课程节选