  "action at a distance" is a weird concept in quantum theory which people
always avoid mentioning in most occasions. In this work, without involving any
concept about "action at a distance", we naturally construct a physical
structure that resembles quantum entanglement only based on the nonlocality of
the wave function. To achieve this, we propose a nonlocal structure of the
single particle wave function by means of a double-well potential model. In
order to better describe this nonlocal system, we have also developed two kinds
of representations: local representation and nonlocal representation. Based on
this nonlocal structure, we obtain a generalized exclusion principle in the
case of antisymmetric nonlocal wave function of the multiparticle, with which
we construct the entangled physical structure as mentioned before. In addition,
we invent a diagram method to describe this entanglement structure and obtained
some general conclusions.
