Kelvin model

例句：

1. 1. The Kelvin model is used to calculate the temperature of a gas.
   开尔文模型用于计算气体的温度。
2. 2.The Kelvin model was developed by Lord Kelvin in the 19th century.
   开尔文模型是19世纪由洛德·凯尔文开发的。
3. 3.In this model, the temperature is directly proportional to the absolute value of the pressure.
   在这个模型中，温度与压力的绝对值成正比。