我的一位同学狂热地追求玛丽。

A classmate of mine gets mad about Mary.

youdao

我的一位同学是来自非洲的一个国家。

One of my classmates is from an African country.

youdao

我的一位同学是个棋类游戏高手，他会玩好多种。

One of my classmates is an expert at board games and he can play many kinds.

youdao

So, I congratulate you of being here in this class, MIT this is really good solid foundation for whatever you go on to do, here at MIT.

所以我要恭喜来上这课的每一位同学，这确实是你要在,学任何东西的基础。

麻省理工公开课 - 化学原理课程节选

I see. Then could you tell us about one of the most memorable students you've had?

我明白了。你能和我们谈谈令你印象最为深刻的一位同学吗？

正在写论文 - SpeakingMax英语口语达人

I need somebody up here who thinks that he or she is a bad liar.

我需要请一名同学上来,一位认为自己不会撒谎的同学。

耶鲁公开课 - 心理学导论课程节选