好与坏，不过是两个可相互转换的名称罢了；
Good and bad are but names very readily transferable to that or this;
压电陶瓷是一种可实现机械能与电能相互转换的功能材料。
Piezoelectric ceramic is a function material which can exchange energy between mechanic and electricity.
压电陶瓷是一种可实现机械能与电能相互转换的功能材料。
Piezoelectric ceramic is a function material which can exchange energy between mechanic and electricity.
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