to extemporize
01
即兴创作, 当场作曲
to improvise or perform spontaneously without prior preparation or rehearsal
例子
Without a script, the actor had to extemporize his lines during the improvised scene, relying on his quick thinking and wit.
没有剧本，演员不得不在即兴场景中即兴发挥他的台词，依靠他的快速思维和机智。
02
即兴发挥, 用手头的东西应付
manage in a makeshift way; do with whatever is at hand
