It is going to be electrical insulators.
它必须是电子的绝缘体。
Electrical insulators of any material.
各种材料制的绝缘子。
Electrical insulators include rubber, plastic, porcelain, and mica.
电绝缘体包括了橡胶、塑料、陶瓷和云母。
But for the crystal to do its job, those elements must also be electrical insulators.
但是，要用晶体来完成任务的话，那些成分就必须也是电子绝缘体。
Many ceramics are good electrical and thermal insulators.
许多陶瓷都是电和热的良绝缘体。
Many ceramics are good electrical and thermal insulators.
许多陶瓷都是电和热的良绝缘体。
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