The U.S.imposed an economic embargo on Cuba in the early 1960s when it moved toward Communism and aligned with Russia during the Cold War.

VOA: standard.2009.05.06

So on your computer's hard drive are again, a whole bunch of tiny magnetic particles aligned this way or this way.

因此，你的电脑硬盘是完全是,有一簇按照这种方式排列的磁性粒子。

哈佛公开课 - 计算机科学课程节选