现在，人们一直关注了至少2000年关于声音在礼堂和剧院里是如何传递的。

Now, people have been concerned about how sound carries in auditoriums and theaters for at least 2,000 years.

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首先我们来看关于声音的问题。

And that takes us to the question of sound.

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关于声音我们讲了很多了，但这不是全部。

So much then for sound, but it's not only that.

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So this was a bit of joke and surprise made them angry about this convergence. Then something even worse happened. People started to talk about using the internet to carry voice conversations for free.

所以这有种开玩笑和惊奇的意味,使他们对聚合很生气，而后更,糟糕的事发生了，人们开始谈论关于,使用互联网免费传输声音会话。

麻省理工公开课 - 媒体、教育、市场课程节选

We've talked a little bit about sound production here.

我们探讨了一些关于声音的产生的问题

耶鲁公开课 - 聆听音乐课程节选

And that takes us to the question of sound.

首先我们来看关于声音的问题

耶鲁公开课 - 聆听音乐课程节选