electrostatic loudspeaker

例句：

1. 1. The device is designed to operate with a low voltage and high efficiency.
   该设备设计用于低电压高效运行。
2. 2.The scientist used an electrostatic charge to attract the particles.
   科学家利用静电吸引粒子。
3. 3.The researcher found that the electrostatic force could be used to control the movement of molecules.
   研究者发现，可以利用静电力来控制分子的运动。