isoperibolic calorimeter

例句：

1. 1. The isoperibolic growthrate of the population is a key factorin economic development.
   人口的正比增长率是经济发展的关键因素。
2. 2. The isoperibolicmodel assumes that all variables are proportionalto each other.
   正比模型假设所有变量都成比例。
3. 3. In the isoperibolic model, the relationship between two variablesis directly proportional.
   在正比模型中，两个变量之间的关系是直接成正比的。