动词
中文翻译：Unknown
同义词：
['perform on the spot', 'improvise']
例句：
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1.The performer extemporised a piece of music for us.
这位表演者为我们即兴演奏了一段音乐。
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2.She was asked to extemporise a speech for the meeting.
她被要求为会议即兴演讲。
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3. The artist often extemporised during his performances.
这位艺术家在演出中经常即兴创作。