形容词
中文翻译：即席的
同义词：
['spontaneous', 'spontaneous例句：1. The speech was delivered impromptu by the president.（总统即席发表了演讲。）2. The band played an impromptu rendition of "Sweet Child O\' Mine".（乐队即席演奏了《甜蜜的孩子》这首曲子。）3. The audience was captivated by the impromptu performance.（观众被即席表演深深吸引。）']
例句：
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1. The speech was delivered impromptu by the president.
总统即席发表了演讲。
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2. The band played an impromptu rendition of "Sweet Child O' Mine".
乐队即席演奏了《甜蜜的孩子》这首曲子。
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3. The audience was captivated by the impromptu performance.
观众被即席表演深深吸引。