即兴之作

extemporization

即的英语翻译：

approach; assume; at once; at present; namely; prompted by the occation; reach
【法】 scilicet

兴的英语翻译：

encourage; maybe; prevail; prosper; rise; start

之的英语翻译：

go; leave; of; somebody; something; this

作的英语翻译：

act as; do; make; pretend; regard as; writings
【法】 perpetrate