What do things in physics mean? What does reason mean?

The word "physics" comes from the Greek word φ υ σ ι κ, which means nature. In ancient times, Europeans called physics "natural philosophy". In the broadest sense, it is the study of natural phenomena and laws. The word "physics" in Chinese and Japanese originated from Fang Yizhi's encyclopedia "Little Knowledge of Physics" in the late Ming and early Qing Dynasties.

The word "physics" appears in Chinese, which is the abbreviation of "material-based reasoning", that is, to investigate the shape and change of things and summarize their laws. The knowledge of physics in China is recorded in early literature, such as Heavenly Creations.

Physics is a natural science that studies the structure, interaction and movement of matter. It is a natural science based on experiments, and an eternal theme of physics is to find all kinds of order, symmetry and symmetry breaking, conservation laws or invariance.

Matter: In the field of physics, we study matter, energy, space, time and their interactions.

Rb: We can fully understand this system by analyzing the basic laws and rules.

That is, the latter is the research and exploration of the former.