thermodynamic activity

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. The thermodynamic activity of a substance can be measured using a calorimeter.
   可以使用卡里计测量物质的热力学活性。
3. 3. The thermodynamic equilibrium between two substances is a fundamental principle in chemistry.
   两种物质之间的热力学平衡是化学中的基本原理。