半导体是导体之间，那里的电力可以自由流动，以及绝缘体，其中电子的约束紧密其原子和不自由流动。
A semiconductor is in between a conductor, where electricity can flow freely, and an insulator, where electrons are bound tightly to their atoms and do not flow freely.
这项工作须检查轴承组件的安全性和绝缘体以及导体的完整性。
Inspection should verify safety of bearing assemblies and integrity of insulators and conductors.
还可用做触媒体，绝缘体以及精密铸造砂等。
Meanwhile, it can be used as catalyst carrier, insulator and precision founding sand, etc.
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