n (1) 医生，大夫(person who has been trained to attend sick people or animals) [C](缩写Dr)：see a～(about a cut) 找医生看病(看刀伤);go to the～('s) 去看病;You'd better call the～if you are ill. 你若是病了，最好请医生。D～Johnson 约翰逊大夫;an animal/army～兽医/军医;Good morning，～. 大夫，您早。under the～(for an illness)(BrE)(infml) 在治疗中;〖同〗physician， surgeon， dentist;

(2) 博士 ((title of a) person who has gained the highest university degree in any subject)[C](缩写Dr)：D～of Philosophy/Science/Literature/Letters/Medicine/Law 哲学/理学/文学/文学/医学/法学博士;doctor's degree 博士学位;

(3) 修理人(person who repairs things) [C](infml)：a radio/bicycle～收音机/自行车修理人;

v (1) 医治(treat by giving or taking medicine) [I， T+n](infml)：He has been～ing there for many years. 他在那里行医已有多年。～a cold/a cut with aspirin 用阿斯匹林治感冒/刀伤;～a child (oneself) for a cold/a stomach-ache 给小孩(自己)治感冒/胃疼;〖同〗treat;

(2) 阉割(make(esp an animal)unable to breed)[T+n];

(3) 篡(涂)改(change(sth)for one's own advantage or in order to deceive)[T+n](infml)：～the accounts涂改账目;～the election results/the evidence/the reports/one's draft-card 窜改选举结果/证据/报告/征兵证;～a play to suit the public 窜改剧本以迎合大众口味;〖同〗change， falsify， alter;

(4) 掺(有害物)(add sth harmful to (food or drink)) [T+n](infml)：～sb's drink/sb's fruit juice with vodka在某人的饮料/果汁里掺入伏特加酒;

→′doctoral adj 博士的;′doctorate n 博士学位(头衔);′doctored adj 阉割的;

【注意】名词doctor当医生或博士讲时的缩写形式Dr 仅用于人名前，如：Dr Davidson(戴维森大夫/博士)。