His assistant switched the speaker on.

他的助手帮他接通麦克风。

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The lone fluent Arabic speaker on the assault team questioned them.

袭击队伍中唯一一个能说流利阿拉伯语的人对他们进行了询问。

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Thereafter Mr Radulovich found himself in demand as a speaker on civil liberties.

后来，拉杜洛维奇先生发现人们需要自己在民权问题上发表各类演说。

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Speaker of the House Nancy Pelosi took the rare step of calling House lawmakers back to Washington to vote on the bill and send it to President Obama without delay.

VOA: special.2010.08.12

Before I begin, I want to say something about our speaker on Wednesday, Andrew Redleaf.

在我开始之前,我想讲一下周三的客座讲师,安德鲁·莱德利夫

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This is a terrible moment of realization on the part of the speaker.

这对讲述者来说是个可怕的领悟。

耶鲁公开课 - 弥尔顿课程节选

Todd Malicoat is a serial entrepreneur, international speaker on SEO, and digital marketing consultant.

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As an aside, my favorite speaker on the list was Bollywood leading man Shah Rukh Khan.

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He said banning a speaker on account of his political views had set a "dangerous precedent".

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