Yeah. I think one of the things that impress me in talking with you and looking at the work you have done is how pro-active you've been in going out and engaging in various communities.

是的，我认为你所作的工作以及,和你的交谈过程中令我印象深刻的地方,就是你能积极地走出去,并在不同的社区参加活动。

普林斯顿公开课 - 人性课程节选

As we'll see in section today, a vaccine does not have to be totally perfect in order to prevent transmission of a disease, because when a disease enters a community its spread from one person to another.

有如我们今天看到的,疫苗不一定非要,绝对完美地阻止疾病的传播,因为当疾病侵入一个社区后,会在人群间传播

耶鲁公开课 - 生物医学工程探索课程节选