按法律规定，场边必须有一名医生。

According to law, a doctor must be present at the ringside.

《牛津词典》

一名医生和一名护士抓住了他的双臂。

A doctor and a nurse caught hold of his arms.

《柯林斯英汉双解大词典》

她决定作为一名医生她对同胞们负有义务。

She had decided that as a doctor she had a responsibility to her fellow creatures.

《柯林斯英汉双解大词典》

This time, you're a transplant surgeon and you have five patients, each in desperate need of an organ transplant in order to survive.

这次你是一名器官移植医生，你有五名病人，每名病人都急需器官移植才能存活。

耶鲁公开课 - 公正课程节选

If only I had chosen to become a doctor, instead of having chosen to become a lawyer.

要是我选择成为一名医生，而不是选择成为一名律师。

耶鲁公开课 - 死亡课程节选

And that person who really studied it systematically, and is given credit for developing the first vaccine, is a Scottish physician named Edward Jenner.

而那个系统研究疫苗,并被誉为发明了第一支疫苗的人,叫爱德华?詹纳,是苏格兰的一名医生

耶鲁公开课 - 生物医学工程探索课程节选