Well, there's a whole population of people who are younger than me that never got smallpox vaccines, right?

所有比我小的人,都没有接种过天花疫苗,对吧

耶鲁公开课 - 生物医学工程探索课程节选

She goes here, she's a fourth year. She's three years younger than me.

她在这儿读书，大四了。她比我小三岁。

我们是校园情侣 - SpeakingMax英语口语达人