the United States federal department that promotes and administers domestic and foreign trade (including management of the census and the patent office); created in 1913
DOC的用法和样例:
例句
He never apologized for crying, but he managed a choked: "thanks, Doc, " as he carried his little friend's body home to bury him. 他没有为自己的哭泣而道歉,但在他带着他的小朋友的尸体回家埋葬的时候,他控制住自己,哽咽地说:“谢谢你,大夫。”