to invent or make something, such as a speech or a device , at the time when it is needed without already having planned it
发音
例句
1. If an actor forgets his words, he has to improvise. 演员要是忘记台词,那就只好即兴现编。 2. As we've not got the proper materials, we'll just have to improvise. 我们没有弄到合适的材料,只好临时凑合了。