名词
中文翻译：Unknown
同义词：
['impromptu performance', 'spontaneous performance']
例句：
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1. The band wasperforming at the local festival.
乐队在当地节日上表演。
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2. She decided to perform a solo on stage.
她决定在舞台上独奏。
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3.The director had no choice but to perform under pressure.
导演别无选择，只能临场发挥。