piezoelectric constant

例句：

1. 1.The piezoelectric material is used to convert mechanical energy into electrical energy.
   这种压电材料用于将机械能转换为电能。
2. 2. The piezoelectric sensor can detect small changes in pressure and temperature.
   这种压电传感器可以检测压力和温度的微小变化。
3. 3. The piezoelectric effect is a phenomenon where an electric field is generated when a material is subjected to stress.
   压电效应是一种现象，当材料受到应力时会产生电场。