So, if we think about the force that occurs between a positively and a negatively charged particle, what we have is essentially a Coulomb force, so we can describe this as a force of attraction.

一个带负电的粒子之间，的作用力,这本质上就是库伦力，我们可以把它，描述成一个引力。

youdao

The attraction that the earth has for every particle or body on its surface is called gravitation.

地球使每一粒子或物体保留于地球表面的吸引力称为地心引力。

youdao

The attraction that the earth has to every particle or body on its surface is called gravitation.

地球使每一粒子或物体保留于地球表面的吸引力称为地心引力。

youdao