他给一位明先生当助手。

He worked as an assistant to one Mr Ming.

《牛津词典》

一切都正常吗，先生？

Is everything in order, sir?

《牛津词典》

老先生一屁股跌坐到椅子上。

The old man slumped down in his chair.

《牛津词典》

who was refuted by Dr. Johnson who kicked a stone and leaped away in terrible pain saying, "I refute it thus."

约翰逊先生反对理想主义者，他踢开一块石头,跳开到很远，一副痛苦不堪的样子，说，“我这样来反驳“

耶鲁公开课 - 文学理论导论课程节选

It was implanted into the first patient, a gentleman in Kentucky, and he stayed alive for a period of time with this device replacing his heart.

第一个植入这个人工心脏病人是,住在肯塔基州的一位先生,他在移植手术后,存活了一段时间

耶鲁公开课 - 生物医学工程探索课程节选