Because the pond is deep enough for an adult to wade into but too deep for a child to stand.

这个池塘不深，一个成年人足以趟过,然而小孩子却无法站立。

普林斯顿公开课 - 人性课程节选

How would you accomplish this kind of - how would you accomplish gene transfer in adult humans?

然而你怎样向,你怎样向一个成年人体内导入基因呢

耶鲁公开课 - 生物医学工程探索课程节选

So, we have no problem understanding a movie where somebody goes to sleep as a teenager and wakes up as Jennifer Garner, as an older person.

我们完全能够看懂电影中,一个少女睡去,一觉醒来却变成了詹妮弗·加纳,一个成年人

耶鲁公开课 - 心理学导论课程节选

You already have an adult organism and you'd like to get the gene transferred.

你现在面对的是一个成年人,你想把基因导入他体内

耶鲁公开课 - 生物医学工程探索课程节选