You have to know your topic inside and out.

你需要彻底弄清你的主题。

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To be a good presenter you need to be engaging with the audience and know your topic.

为了成为一个优秀的演讲者，你需要让观众了解你的主题。

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When the lights go down and the spotlight is on you, no matter how much you know your topic, conveying the information suddenly seems daunting.

当所有灯光关掉，聚光灯对准你时，突然要演讲了，无论你对你的主题有多了解，此时总会令你有些怯步。

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How much do they know about your topic?

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Also make sure you take a cautious approach, as you never know how a particular topic or issue may offend one of your colleagues, Zupan adds.

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The reporter may ask you about a subject which you know a great deal, only you have already decided it is not one of your main messages on this topic.

FORBES: Open With A Short Answer -Media Training