There's always, and I think this is nearly invariable -there's an element in Milton's similes that stands outside the framework of the basic comparison.

有一点是时常出现并且几乎不变的,-就是在弥尔顿的明喻中始终有一个元素,是从基本的对比框架中脱颖而出的。

耶鲁公开课 - 弥尔顿课程节选

And it's important to remember that Milton will - this is probably an invariable truth, but I'll qualify it nonetheless - that Milton will typically imitate his predecessors only with a difference.

重要的是我们要记住弥尔顿将,这应是无可否认的事实，但我还是要验证一下,弥尔顿通常将,模仿他的文学前辈而仅留一个不同之处。

耶鲁公开课 - 弥尔顿课程节选