Adjective:
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
近义词 offhand即时的ad-lib即兴演唱impromptu即席的extempore即兴的makeshift临时的temporary暂时的offhanded立即的occasional偶然的extemporary当场的on-the-spot现场的impermanent暂时的unprepared无准备的off-the-cuff未预备的improvised即席而作的unrehearsed未经排练的extemporal无准备的即席的…improvisatory即席的(临时凑合的…spontaneous自发的，自然的，本能的…spur-of-the-moment即兴的, 一时兴起的…
An extemporaneous policy decision.一个权宜的政策决定