It uses average yearly data in its computations, and focuses on only two major pollutants - nitrogen and phosphorous.

VOA: standard.2010.08.04

I think of data hiding as basically saying, one can only access instance values, or, we'll call them that, instance values through defined methods.

一个人仅仅可以访问实例变量，或者，我们可以这么来说，通过定义好的方法，来访问实例的变量。

麻省理工公开课 - 计算机科学及编程导论课程节选

Just like u, we'd like to be able to express it in a way that allows us to calculate what happens only from equation of state data.

就像内能u一样，我们希望能够利用状态方程的数据,计算出其表达式,这些表达式能方便我们说出即将发生的过程。

麻省理工公开课 - 热力学与动力学课程节选