The number of students doubled between 2000 and 2005, due in part to the introduction of free primary education.

VOA: standard.2010.02.25

But as part of a more rigorous introduction to understanding how the machines work and writing programs at this lower level.

作为一种,理解电脑工作机制,和在低平台上编程的入门方法。

哈佛公开课 - 计算机科学课程节选