中英释义：
我不擅长即兴演讲。
M not good at speaking off the cuff.
最佳的即兴演讲是事先写好了稿子的演讲 ( 露丝戈登 )
The best impromptu speeches are the ones written well in advance ( Ruth Gordon )
他准时到达会场并进行了一次即兴演讲。
He arrived at the meeting place on time and made an off the cuff speech.
在他即兴演讲的时候就是他状态最好的时候。
He is at his best when he speaks off the cuff.
现在我将简要的介绍一下比赛规则，本次比赛分为主体演讲，现场提问，即兴演讲和才艺展示四个部分。
Now, I will tell you something about this contest in general, Today's contest includes Prepared contest, Questions and Answers, Impromptu speech and Talent show.
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即兴
improvise; ad-lib; extemporize; impromptu; extemporaneous; aleatory; offhand; extempore; on the spur of the moment; off the cuff; on your feet; extemporaneously
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演讲
give a lecture; speak; lecture; address; give a speech; make a speech; deliver a talk; give an address; speech; talk; discourse; oration; oratorical; on; oratorically