1.
He had to extemporize because he had forgotten to bring his notes.
他因为忘了带讲稿, 只好即席发言.
2.
He has to extemporize because he has forgotten to bring his note
他因为忘了带讲稿,只好即席发言
3.
He have to extemporize because he have forget to bring his note.
他因为忘了带讲稿，只好即席发言。
4.
I'll just have to give the speech off the top of my head.
没有时间写稿，我只好即席发言。
5.
He has to extemporize because He has forget to bring his note
他因为忘了带讲稿, 只好即席发言
6.
Americans like debates because the candidates can be compared in an unscripted,live performance.
美国人喜欢辩论，因为他们可以根据候选人现场的即席发言，对他们进行比较。
7.
When the invited speaker did not arrive, the chairman rose to the occasion and delivered an excellent unprepared speech.
当被邀请的演讲者没来时，主席随机应变，作了一场精彩的即兴发言。
8.
He is good at make impromptu speech.
他善于发表即席演说。
9.
To improvise and deliver extemporaneously.
即兴演讲，即兴发言
10.
The moderator could not choke her off
主席制止不住她的发言。
11.
Madam Chairman, may I be allowed to speak?
主席先生, 我可以发言吗?
12.
chairperson, spokesperson, business person, etc
主席、 发言人、 商人等.
13.
To invent, compose, recite, or execute something offhand.
即席创作；即席表演即兴地发明、创作、背诵或者制成某事物
14.
How can anyone be faultless in what he says?How can every remark one makes in impromptu discussion be perfectly correct?
哪有什么金口玉言，即席讲几句话就句句准确？
15.
A woman who chairs and speaks for a jury.
女首席陪审员陪审团的女主席和发言人
16.
I won't prepare a speech: I'll talk off the cuff.
我不准备发言稿，我将即兴发言。
17.
Half the committee walked out on the chairman while he was still speaking.
主席还在发言时就有半数委员退场。
18.
At the end of the meeting, the chairman made a concluding speech.
会议结束时，主席作了总结性发言。