| 单词 | impromptu |
| 例句 | impromptu adjective •an impromptu lecture:unrehearsed, unprepared, unscripted, extempore, extemporized, extemporaneous, improvised, spontaneous, unplanned | informal off-the-cuff, offhand, spur-of-the-moment, ad-lib. ANT prepared, rehearsed.▶adverb •they played the song impromptu:extempore, spontaneously, extemporaneously, without preparation, without rehearsal | informal off the cuff, off the top of one's head, on the spur of the moment, ad lib. |
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