No matter how much knowledge you have, if your subject is at all sensitive or your information is classified, be careful when discussing it during your impromptu speech.
如果你的演讲主题比较敏感或者你的信息涉及到机密，不管你掌握多少知识，在演讲中谈论到这些问题时都要小心谨慎。
Pulling together topics from previous competitions, we have put together tips, ideas and vocabulary to give you as much preparation for the Impromptu speech as possible.
通过总结过往比赛的话题，我们为你的即席演讲提供了尽可能多的贴士、话题和词汇。
Pulling together topics from previous competitions, we have put together tips, ideas and vocabulary to give you as much preparation for the Impromptu speech as possible.
通过总结过往比赛的话题，我们为你的即席演讲提供了尽可能多的贴士、话题和词汇。
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