isopreference curve

例句：

1. 1. The isopreferencecurve shows the relationship between two variables.
   等势曲线显示两个变量之间的关系。
2. 2. The isopreference curve can be used to predictthe optimal point for a given set ofconditions.
   等势曲线可以用来预测给定条件下的最优点。
3. 3. The isopreference curveis an important tool in understanding the behaviorof organisms in different environments.
   等势曲线是理解不同环境中生物行为的重要工具。