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ex·tem·po·ra·ne·ous AHD[ĭk-stĕm'pə-rāʹnē-əs] D.J.[ɪkˌstempəˈreɪniːəs]K.K.[ɪkˌstɛmpəˈreniəs]adj.（形容词）- Carried out or performed with little or no preparation; impromptu:即兴的：毫无准备的或稍作准备就执行或表演的；即兴的：an extemporaneous piano recital.即兴钢琴独奏
- Prepared in advance but delivered without notes or text:不用讲稿的：事前有所准备而不带笔记或本文的：an extemporaneous speech.不用讲稿的演讲
- Skilled at or given to unrehearsed speech or performance:善于即兴讲话的：擅长于或倾向于即兴演说或即兴表演的：an accomplished extemporaneous speaker.一位高明的即席演讲者
- Provided, made, or adapted as an expedient; makeshift:临时的，权宜的：作为权宜之计而提供的、制作的或使用的；权宜的：an extemporaneous policy decision.一个权宜的政策决定
- From Late Latin extemporāneus 源自 后期拉丁语 extemporāneus
- from Latin ex tempore * see extempore 源自 拉丁语 ex tempore * 参见 extempore
extem'poraneʹity AHD[-pər-ə-nēʹĭ-tē] （名词）extem'poraʹneously adv.（副词）extem'poraʹneousness n.（名词）extemporaneous, extemporary, extempore, impromptu, offhand, unrehearsed, unpremeditated, ad-lib- These adjectives mean spoken, performed, done, or composed with little or no preparation or forethought.Extemporaneous, extemporary, and extempore most often apply to discourse, as a public speech, that is delivered without the assistance of a written text, though it may have been planned in advance: 这些形容词的意思是未经准备或构思而演讲的、表演的、进行的或谱写的。Extemporaneous，extemporary 和 extempore 常适用于演讲，如公共演说， 虽然这可能经过提前筹划但演讲时却不需书面材料的帮助： an extemporaneous address;即兴演说；an extemporary lecture;即兴讲座；an extempore skit.即兴小品。
- Impromptu even more strongly suggests action or expression that comes on the spur of the moment in response to an unforeseen need: Impromptu 更强烈地表现对意料之外的需要所做出的相应的动作或表现： an impromptu speech;即席讲话；an impromptu dinner.便饭。
- Offhand implies not only spontaneity but also a casual or even cavalier manner: Offhand 不但表示自发的，也表示不经意的甚至漫不经心的举止的： an offhand remark. What isunrehearsed is said or done without rehearsal or practice though not necessarily without forethought: 随意的评论。 所谓unrehearsed ，就是未经复述或练习就说或做的， 虽然没有不构思的必要： a few unrehearsed comments.未经练习的评论。
- Unpremeditated applies to action taken without prior thought or plan;often the term implies impulsiveness prompted by strong feeling: Unpremeditated 表示未经提前思考或计划而采取的行动；这个词常表示在强烈情感的怂恿下而造成的冲动： asked an unpremeditated question. Something that isad-lib is spontaneous and improvised and therefore not part of a prepared script or score: 随口提出一个问题。 ad-lib 的事物是自发产生的和即兴而作的， 因而不是预先准备的手稿或记录的部分： an ad-lib joke;随口开的玩笑；an ad-lib solo. 即兴的独奏
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