A Review on Natural Reality with Physical Equations

A natural behavior is used to characterize by differential equation established on human observations, which is assumed to be on one particle or one field complied with reproducibility. However, the multilateral property of a particle P and the mathematical consistence determine that such an understanding is only local, not the whole reality on P, which leads to a central thesis for knowing the nature, i.e. how to establish a physical equation with a proper interpretation on a thing. As it is well-known, a thing consists of parts. Reviewing on observations, we classify them into two categories, i.e. out-observation and in-observation for discussion.