impromptu u即兴曲;即席的;即席;即兴的
Fantasy Impromptu幻想即兴
Fantasic Impromptu肖邦
Ohio Impromptu影名;俄亥俄即兴作
impromptu dishonesty没有提前准备的谎言
impromptu message即席报文
Not Impromptu不即席讲
In addition to writing songs, he is also famous with the Piano Works. Impromptu and Moments musicaux are the important genres in his piano works, which created the far-reaching impacts on future composers.
即兴曲、音乐瞬间是他钢琴作品中两种重要的体裁，对以后作曲家的创作影响深远。
参考来源 - 理性的即兴 瞬间的永恒ADJ（形容词） An impromptu action is one that you do without planning or organizing it in advance. 无事先准备的
This afternoon the Palestinians held an impromptu press conference.
今天下午巴勒斯坦人召开了一场临时记者招待会。