即兴表演英语通常翻译为"improv"或"improvised performance"。这个词来源于英语单词"improve"，意思是"改进"或"即兴创作"。

例句：

"The improv group is performing tonight at the comedy club."

"即兴表演小组今晚将在喜剧俱乐部演出。"

"I love watching improv because it's always fresh and spontaneous."

"我喜欢观看即兴表演，因为它总是新鲜和自发的。"

"Do you want to join the improv class and learn how to think on your feet?"

"你想参加即兴表演课程吗，学习如何即兴发挥？"