"This not a test for one person, this is not a test for one entity,"

VOA: standard.2009.10.09

I'm going to give you a glass case and in the glass case is an entity with this as one kilogram, by definition.

我给你一个玻璃箱,箱子里放的东西刚好是 1 千克,这是根据定义的

耶鲁公开课 - 基础物理课程节选

What we're really getting at is the idea of saying I want to have a way of grouping together information into units that make sense. So I can go back to one of those topics we had at the beginning, which is the idea of abstraction, that I can create one of those units as a simple entity, bury away the details and write really modular code.

组合成为有意义的单元,那么这就让我们回到,一开始讲的话题之一了,这就是抽象的概念,也就是我可以以一个简单的，实体的形式创建这样的一个单元，把具体实现隐藏然后写一些,真正模块化的代码,我们在以后的课程中。

麻省理工公开课 - 计算机科学及编程导论课程节选