A mule is not spending 1/2 of its time as a donkey, and 1/2 of its time as a horse, we don't see it flickering back and forth between the two, that's not what we see.

骡子并不是一半的时间是驴，另一半的时间是马，我们不会看到它在两者之间来回变化，这不是我们所看到的情况。

麻省理工公开课 - 化学原理课程节选

N But it's definitely not one and in fact it wasn't N in the case of Selection Sort because remember the algorithm we implemented on stage last week had me going back and forth across the stage selecting on iteration, the smallest person I can find, the smallest number and then putting them into place.

但在选择排序中，肯定不会是1，也不是,注意，上周我们在这儿,实现的算法中，反复地,迭代进行选择，选出最小的数,然后将其放在合适的位置。

哈佛公开课 - 计算机科学课程节选

And then, they have this very complicated back-and-forth about things that they remembered, or didn't, and they hashed these things over: Then Carlo asked Dean if he was honest and specifically if he was being honest with him in the bottom of his soul.

于是，他们有了这个十分复杂的,关于他们想得起来想不起来的事的来回选择，并且他们充分讨论了这些事情：,然后卡洛问迪恩他是否诚实，特别是他是否,从灵魂深处对他诚实。

耶鲁公开课 - 1945年后的美国小说课程节选