doctorate

n.博士学位

do with sth, do without, do without (sb/sth), do wrong, do's, do's and don'ts, do-gooder, do-it-yourself, do/try one's best, doc, docile, docilely, docility, dock, docker, docket, dockland, dockyard, doctor, doctoral, doctrinaire, doctrinal, doctrine, document, documentary, documentation, dodder, dodderer, doddering, doddle, dodge, dodgems, dodger, dodgy, dodo, doe, doer, does, doff, dog,