[N-UNCOUNT 不可数名词]牙科医术Dentistry is the work done by a dentist.
Oxford
den·tis·try/ˈdentɪstri; NAmEˈdentɪstri/noun[uncountable ]1the medical study of the teeth and mouth 牙科学2the work of a dentist 牙科医术;牙医的工作◆preventive dentistry预防牙科den·tis·try/ˈdentɪstri; NAmEˈdentɪstri/