Layered materials can be divided into two classes: the first maintains the layered framework by Van der Waals force; and the second by the coulombs.

层状物质可分为两类：第一类是层结构由范德华力维持；第二类是层结构由库仑力维持。

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By analyzing the interaction of the locomotor charges and using simple geometrical relationship and the Coulombs law, we provide a new interpretation for the Ampere force law.

目的在于避开磁场概念 ，只从静电场理论的角度讨论电磁问题 ，通过对运动电荷相互作用力的分析 ，运用简单的几何关系和库仑定律 ，重新诠释了安培力定律。

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