更改

== Principles: mechanics and ensembles ==

== Principles: mechanics and ensembles 原理：力学和<font color="#FF8000">系综 ensembles</font>==

{{main|Mechanics|Statistical ensemble (mathematical physics)|l2=Statistical ensemble}}

{{main|Mechanics|Statistical ensemble (mathematical physics)|l2=Statistical ensemble}}

 

In physics, two types of mechanics are usually examined: [[classical mechanics]] and [[quantum mechanics]]. For both types of mechanics, the standard mathematical approach is to consider two concepts:

In physics, two types of mechanics are usually examined: [[classical mechanics]] and [[quantum mechanics]]. For both types of mechanics, the standard mathematical approach is to consider two concepts: