thermodynamic variable

例句：

1. 1.The study of thermodynamics is crucial for understanding the behavior of matter under extreme conditions.
   研究热力学对于理解物质在极端条件下的行为至关重要。
2. 2. In thermodynamics, energy is transferred from one system to another through a process called heat transfer.
   在热力学中，能量通过热传递从一个系统转移到另一个系统。
3. 3. The thermodynamic variable represents the change in entropy of a system as it interacts with its surroundings.
   热力学变量表示系统与其周围环境相互作用时熵的变化。