ad lib [ ,æd'lib ]

• n. remark made spontaneously without prior preparation

  同义词： ad-lib

• v. perform without preparation

  同义词： improvise improvize ad-lib extemporize extemporise

• adj.
  • said or done without having been planned or written in advance

    同义词： ad-lib spontaneous unwritten

  • with little or no preparation or forethought

    同义词： ad-lib extemporaneous extemporary extempore impromptu offhand offhanded off-the-cuff unrehearsed

• adv. without advance preparation

  同义词： ad libitum spontaneously impromptu

以上来源于: WordNet