资料来源 : pyDict

随意

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Ad libitum \Ad lib"i*tum\
   At one's pleasure; as one wishes.

资料来源 : WordNet®

ad libitum
     adv : without advance preparation; "he spoke ad lib" [syn: {ad lib},
            {spontaneously}, {impromptu}]