ex·tem·po·re /ɪkˈstɛmpə(ˌ)ri/
 (a.)即席的,當場的(ad.)即席,當場即席之作


 Ex·tem·po·re adv.  Without previous study or meditation; without preparation; on the spur of the moment; suddenly; extemporaneously; as, to write or speak extempore. --Shak. -- a. Done or performed extempore. “Extempore dissertation.” --Addison. “Extempore poetry.” --Dryden. -- n. Speaking or writing done extempore. [Obs.] --Bp. Fell.

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 extempore
      adj : with little or no preparation or forethought; "his ad-lib
            comments showed poor judgment"; "an extemporaneous
            piano recital"; "an extemporary lecture"; "an extempore
            skit"; "an impromptu speech"; "offhand excuses";
            "trying to sound offhanded and reassuring"; "an
            off-the-cuff toast"; "a few unrehearsed comments" [syn:
             ad-lib, extemporaneous, extemporary, impromptu,
             offhand, offhanded, off-the-cuff, unrehearsed]
      adv : without prior preparation; "he spoke extemporaneously" [syn:
             extemporaneously, extemporarily]