improvisatory

劍橋詞典

(of speech or music ) done or performed without having been planned exactly , making something up as it is being performed
（演講、表演等）即興的
an improvisatory dance /song 即興舞蹈／歌曲
The music allows for improvisatory variation . 這首樂曲允許即興變奏。
his improvisatory collaboration with director André Gregory 他與導(dǎo)演安德烈·格里高利的即興合作 返回 improvisatory