theory of equation of state

例句：

1. 1. The theory of thermodynamics is the study of how energy changes over time.
   热力学理论是研究能量随时间变化的学科。
2. 2. The theory of relativity states that space and time are not absolute but relative to an observer'sframe of reference.
   相对论理论表明，空间和时间不是绝对的，而是相对于观察者参考系的相对概念。
3. 3. The theory of thermodynamics has been applied in various fields, such as engineering and environmental science.
   热力学理论已被应用于工程和环境科学等多个领域。