So there's a lot of power in this, both engagement and both allowing students to get conceptual understandings of things that are very hard to understand and they're abstract.

所以这是很强大的，不论是参与性,还是使学生能更好,理解那些,很难的概念,很抽象的概念。

麻省理工公开课 - 媒体、教育、市场课程节选

When you're working on a file, it's saving constantly to RAM but also hopefully to disc, the hard disk so you don't actually lose it if the power goes off.

当你打开一个文件，它不断地保存在内存中,但对于光盘，硬盘,当你断开电源的时候，数据不会丢失。

哈佛公开课 - 计算机科学课程节选