We know what an electric field is, it's just a space through which a Coulombforce operates.
我们知道，电场不过，是库仑力的作用空间。
2
We can use the Coulombforce law to explain this where we can describe the force as a function of r.
我们用库伦定律解释它，力作为距离r的函数，让我们考虑一下。
3
The conventional inter-particle force model, including van der Waals force, Coulombforce and image force, could not explain these interaction behaviors.