If you're not updating some variable by incrementing it or decrementing it -- if you're not changing anything, presumably the conditions are never going to evaluate to false or the opposite, so you're just going to have an infinite loop, which might be your goal, but odds are it's not.

如果你不通过增加或减少它来改变一些变量,-如果你不改变什么，大概那个条件永远不会变成错误的,或相反的，所以你将得到一个无限循环，那可能是你的目标，但可能也不是。

哈佛公开课 - 计算机科学课程节选

But every bard added and subtracted things to suit his own talents.

但每个诗人又根据自己的智慧,增加或减少一些内容

耶鲁公开课 - 古希腊历史简介课程节选

When we're doing something that is interactive, we have to cut down on the detail of what we're doing because we can't support that in real time, but nonetheless there're lots of things we can do interactively.

当我们在做一些,互动性的项目时，我们需要减少,正在做的细节,因为在实际时间里,我们并没有足够时间支持它，但是还有很多其他东西,可以做得具有互动性。

麻省理工公开课 - 媒体、教育、市场课程节选