to adjust or reform a situation to make it more logical, efficient, or compatible with standards

the branch of chemistry concerned with the application of the techniques and theories of physics to the study of chemical systems

to axiomatize; the process of formulating a system as a set of axioms or general enough to derive all its results.

The collective subjects of mathematics, physics, and chemistry; an abbreviation for [[数学|數學|shu4 xue2]], [[物理|物理|wu4 li3]], and [[化学|化學|hua4 xue2]].