What a sound idea

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What a sound idea

机译：好主意

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At first glance it appears to be a minuscule marble spinning around its vertical axis. Look closer, however, and you see a stationary spherical membrane of fluid, just 3 microns across. It is the stuff inside the droplet that is rotating. This self-contained centrifuge has been created by blasting a droplet of fluid with sound.

机译：乍一看，似乎是一块微细的大理石绕其垂直轴旋转。然而，仔细观察，您会看到一个固定的球形流体膜，直径仅为3微米。液滴内部的东西正在旋转。这种自成一体的离心机是通过用声音喷射一滴流体而创建的。

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《The economist》 |2012年第8787期|p.A13-A14|共2页
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What a sound idea

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