即席演说 meaning in Chinese

extemporization
extemporize
extemportize

He is good at making impromptu speeches .
他善于发表即席演说。
He had to speak off the cuff because he forgot to bring his prepared speech
他不得不做一个即席演说因为他忘了带准备好的讲稿。
So , my remarks her e today , being extemporaneous , i am sure you will make allowances for me
因此，今天本人在此发表的即席演说，我确信各位一定会包容。
I am not a very good extemporaneous speaker ; in fact , i am no speaker at all ； but i am not so very much discouraged , be cause a few days ago i was at hyde park , and went to the president ' s library
我并不擅于即席演说，事实上根本称不上是演说家，但我不会因此怯场，因为前几天我在海德公园参观过总统图书馆，在那里看见的一些东西鼓励了我，让我感觉各位或许不会对我的即席演说要求太多。