"And so they've had to act in sort of a more ad hoc fashion.

VOA: standard.2010.05.05

I've been using the blackboard a little ad hoc here, but suppose I neaten things up here now and present this rectangle is let's say R RAM, the memory inside of your computer.

我在这里特别地使用这块黑板，假如我整理这些东西，把它们呈现,这个长方形，假如说就是内存，你电脑的内存。

哈佛公开课 - 计算机科学课程节选