Changing the structure of the excitation device can change the resonance frequency of the PZT. 通过改变压电陶瓷的结构可以改变压电陶瓷的谐振频率。
"A sweet temper" is a figurative expression, but "sweet coffee" is not. "甜蜜的性情"是个比喻的说法，而"甜咖啡"则不是。
Resonant frequencies are related to the shape and size dimensions of the element. 共振频率与这种元件的形状和大小有关。
Based on the equivalent circuit, the resonance frequency equation is derived and the resonance frequency is obtained. 在此基础上，推出了弹性薄圆盘径向振动的频率方程以及振子共振频率的表达式。
