She measured the distance between the bones in the finger, because when we get older, the space becomes smaller-- they become tighter.

她测量指骨间的距离，人越老，骨骼间空隙变得越小-,指骨变得更紧。

哈佛公开课 - 幸福课课程节选

So we have to assume that the occasion for this poem is some kind of question posed by John Milton, Sr., a question like, "To what end am I supporting you, Son?

我们可以假定这个诗的起因是,老约翰弥尔顿问小弥尔顿，“我到底为什么要资助你，儿子？“

耶鲁公开课 - 弥尔顿课程节选

Good question, so there is this little reading head kind of like in an old phonograph player that does move back and forth and in and out depending on the implementation.

好问题，这就像,老留声机里的小读头,它通过来回移动,来完成不同的操作。

哈佛公开课 - 计算机科学课程节选