and if you've never been, don't do this, it's largely because there are these very sensitive moving parts and there are relatively few moving parts left in today's computers.

如果你没做过，不要做这些事情，主要是因为电脑里面有一些很敏感,且高速运转的部件,以及相对不运转的部件。

哈佛公开课 - 计算机科学课程节选

There are primaries in all these states that you never, you probably have heard of, states you probably have heard of along the way.

在所有的州都会进行初选,有些州名你甚至都没听说过,或者你只听过它周围的州的名字

耶鲁公开课 - 博弈论课程节选