即兴的英文：
improvisatori

an impulse shopper;impulse buying.
即兴的购物者;即兴购物

Something improvised, especially a dramatic skit.
即兴作品即兴而作的东西，尤指戏剧小品。

A singsong round the camp-fire
围着营火的即兴歌唱会.

The actress forgot her lines and had to extemporize.
那个女演员忘了台词，只好即兴表演。

The Best impromptu speeches are the ones written well in advance.
最佳的即兴演讲是事先写好了稿子的演讲。

But the fervid facility of his impromptus could not be so accounted for
但是，如此解释他那高超的即兴演奏的技巧就不行了。

An impromptu party
即兴的聚会

Skilled at or given to unrehearsed speech or performance
擅长于或倾向于即兴演说或即兴表演的.

Extemporaneous:Carried out or performed with little or no preparation; impromptu
即兴的:毫无准备的或稍作准备就执行或表演的;即兴的.

Hot jazz
强烈而又即兴的爵士乐

An instrumental work with an improvisatory style and a free form.
随想曲，幻想曲具有即兴风格和自由形式的一个器乐作品