他们挤出法人赞助人和富有的捐款人的美金去创建一个智库网络和一个媒体传音筒。
They tapped the unlimited resources of corporate sponsors and wealthy donors to create a network of think tanks and media outlets.
树叶吹起来，发出的声音可以传的很远，你可以树叶传音，也可以通过树叶与其他人交谈。
Sometimes you use leaves to call to people, to talk to them, since with leaves the sound goes farther.
地球表面的气压相对稳定，因此设计地面用的传音器，工程师并不需烦恼气压的大幅变化。
Air pressure on the surface of the Earth is fairly constant, so in designing a microphone for use on land, engineers don't have to worry about large variations in air pressure.
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