A doctor is a person licensed to practice medicine, as a physician, surgeon, dentist, or veterinarian.

医生是持有行医执照的人，如医生、外科医生、牙医或兽医。

youdao

Prof Richardson continues to be licensed to practice as a doctor.

BBC: England

They continue training in residency programs that allow them the option to graduate and practice as a primary care doctor, or pursue fellowship to sub-specialize in a specific area.

FORBES: Doctor Shortage Isn't Going Away

Mr Swire - a doctor - felt forced to stand down as a partner in his medical practice.

BBC: Living with Lockerbie