They're both doctors by profession.

他们两人的职业都是医生。

《牛津词典》

Harper was a teacher by profession.

哈珀的职业是教师。

《柯林斯英汉双解大词典》

He was an electrician by profession.

他的职业是电工。

《牛津词典》

"I offer Catholic Mass,' cause I'm a Catholic priest by profession,and so it is actually the feast day of Mary,Mother of God.

VOA: special.2009.12.28

He just keeps on. Bogdanovich reports him being very gloomy about the time the documentary was made, because how he was treated by the profession.

他一直在奋斗，博格达诺维奇说,他在纪录片拍出来的时候,情绪很低，这都是因为他在事业上受到的对待。

麻省理工公开课 - 电影哲学课程节选

Dastjerdi,who is former member of parliament and a gynecologist by profession, will be Iran's new health minister.

VOA: standard.2009.09.03

To avoid the side effects of ongoing chemotherapy, Parles, a librarian by profession, then immersed herself in cancer research.

CNN: How to get Kennedy-esque health care on your budget

It may have helped that Ms Bachelet is a medical doctor by profession.

ECONOMIST: The dangers of a reputation for dodgy statistics

The other councillor, Fawzia al-Bahr, is an engineer by profession, it said.

BBC: NEWS | Middle East | Women appointed to Kuwait council