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1·That was when Pierre Fauchard published his book called The Surgeon Dentist.

也就是从皮埃尔·费查出版他的《牙外科医生》的时候起。

2·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。

3·It has undertaken research suggesting the risk of a patient catching HIV from their doctor, dentist or surgeon is less than one in five million, similar to that of being killed by lightning.

据英国卫生部开展的调查，医生、牙医、或外科医生将HIV病毒传染给病人的风险还不到500万分之一，和雷击致死的几率类似。