It's a state function, so we're at constant temperature and pressure, and now we want to consider some chemical change or a phasetransition or you name it.
这就是态函数，我们处于恒定的温度和压强之下，然后考虑某些化学变化或者相变，或者你想考虑的东西。
2
Shock temperature measurement is a crucial subject in equation-of-state and high-pressurephasetransition investigations.
冲击温度测量是物态方程及高压相变测量中的一项至关重要的课题。
3
The change of sound velocity with pressure, dryness degree, void-fraction, and phase-transition coefficient are analyzed. Some important conclusions are derived.