[] a person who is qualified to work in a profession, especially medicine or law（尤指医学或法律界的）从业人员◆a medical/legal practitioner开业医生／律师◆the Institute of Practitioners in Advertising广告从业者协会a person who regularly does a particular activity or follows a particular theory专门人才◆enthusiastic practitioners of lean manufacturing热衷于精益制造的专家insolvency practitioner