In particular functions that operate on the data, perhaps on other data as well. The key idea here is to bind together the data and the functions that operate on that data as a single thing.

特别是处理数据的函数，也可能处理其他数据,这里的关键思想就是,将函数和操作数据的函数。

麻省理工公开课 - 计算机科学及编程导论课程节选