pressure-enthalpy diagram

例句：

1. 1.The pressure-enthalpy diagram shows the relationship between temperature and pressure.
   压力焓图展示了温度和压力之间的关系。
2. 2. In this diagram, you can see the changes in energy levels as the system is heated.
   在这个图中，你可以看到随着系统加热能量水平的变化。
3. 3.The pressure-enthalpy diagram is used to analyze the behavior of a gas under different conditions.
   压力焓图被用来分析气体在不同条件下的行为。