of Extemporize
One who extemporizes.
extemporized
v. 即兴创作, 即席演奏( extemporize的过去式和过去分词 )
extemporizer
n. extemporize的变形
extemporizes
v. 即兴创作, 即席演奏( extemporize的第三人称单数 )