Speak to Me
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视频说明
What's that? You can't hear me? Maybe you need some new speakers! Don't have the cash to buy them? Well, Mr. O in the most recent O Wow Moment from the Children's Museum of Houston, will explain the science behind speakers and show you how to make speakers!
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热门免费线上视频标签儿童
插件
05 二月 2017
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