And now, if I'm touching mouse pointer, we saw that Boolean expression before, play sound meow, wait a couple of seconds, and then just keep checking.

现在，如果我们碰下鼠标指针，起初我们看到一个布尔表达式，播放猫叫的声音，等几秒钟，然后如刚才那样做检测。

哈佛公开课 - 计算机科学课程节选

So now in this problem, we can do something slightly different, and let's use this expression here,and I will do that, then I'll stop for today.

对于这个问题,我们可以稍微做点变化,让我们用这个式子,就是这样,今天就讲到到这里

耶鲁公开课 - 基础物理课程节选

All I'm doing here, nothing particularly exciting, I'm simply plugging this expression in for P and then I multiplied the whole thing out because it was all multiplied by q.

这些计算过程确实很枯燥,我只是把这个算式代入到P中,然后打开整理,因为每一项都乘以了q

耶鲁公开课 - 博弈论课程节选

They come from writing i prime and j prime in terms of i and j, then sticking it in an expression and identifying the new representation.

写出用 i 和 j 来表示 i' 和 j' 的式子,再代入分量的表达式,就能得到新的式子

耶鲁公开课 - 基础物理课程节选