ex·tem·po·rary /ɪkˈstɛmpəˌrɛri/
  (a.)無準備的
  Ex·tem·po·ra·ry a.
  1. Extemporaneous. “In extemporary prayer.”
  2. Made for the occasion; for the time being. [Obs.] “Extemporary habitations.”
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  extemporary
       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, extempore, impromptu,
             offhand, offhanded, off-the-cuff, unrehearsed]