This behavior spreads from one person to another, along with the emotion responsible for it.

VOA: special.2009.12.22

Now we don't need the cow anymore because you could pass it from one person to another, and pass the immunity from one person to another.

由于它可以在人与人之间传播,就不再需要奶牛了,就可以把免疫力在人与人之间传播

耶鲁公开课 - 生物医学工程探索课程节选

And Meltzoff finds that babies more often than not stick their tongues out back, suggesting some sort of social connection from one person to another, and then later on babies are mimics.

迈尔左夫发现,婴儿往往会把舌头伸出来再缩回去,表明了人与人之间的某种社会联系,也说明了婴儿是模仿者

耶鲁公开课 - 心理学导论课程节选

"People tend to congregate and be together and the way the common cold virus is transmitted from one person to another is through handshakes,through sneezing, or coughing on one another."

VOA: special.2011.04.20

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