Your young brother or sister, or my little children, can draw pictures of family members that barely look like family members.

你的弟弟妹妹或者我的小宝贝们,可以画一些看起来,仅仅有点像家庭成员的画

耶鲁公开课 - 死亡课程节选

Yeah, so for example, you get exposed to-- before there was a vaccine your brother or sister had chickenpox, and so you got exposed to chickenpox naturally through your contact with them.

举个例子来说,如果你生活在这样的环境里,兄弟姐妹们还没接种疫苗就得了水痘,而你通过与他们相接触,在自然情况下接触到了水痘病毒

耶鲁公开课 - 生物医学工程探索课程节选