polytropic exponent

例句：

1. 1. The polytropic nature of the planet's climate is a fascinating subject.
   行星气候的多相性质是一个引人入胜的主题。
2. 2. Polytropic flow occurs in many natural phenomena, such as rivers and ocean currents.
   多相流动在许多自然现象中发生，如河流和海洋流。
3. 3. The polytropic index measures how much energy is lost to heat transfer.
   多相指数衡量能量有多少被热传递损失。