So the reasons for this really enormous shift in plans, and the enormous shift in subject matter, are worth exploring.

弥尔顿的计划变化为何如此之大，他对主题的选择为何有这么大的改变，是值得探究的。

耶鲁公开课 - 弥尔顿课程节选

Not really. it was kind of noodling around with it, varying it a little bit.

不完全是,它在主题的旋律上,做了一点变化

耶鲁公开课 - 聆听音乐课程节选