因为某种不可理解的原因，该有楼梯的地方却没有。

For some unfathomable reason, there are no stairs where there should be.

《柯林斯英汉双解大词典》

一个奇怪的、几乎不可理解的事实是，许多教授认为他们应该用一种枯燥的方式讲课，就像他们觉得写作也必须很枯燥一样。

The strange, almost incomprehensible fact is that many professors, just as they feel obliged to write dully, believe that they should lecture dully.

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这是我们不可理解的事。

This is something beyond our comprehension.

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Milton has to justify or at least understand this seemingly incomprehensible and unjustifiable event. It's this drive to theodicy that accounts for the poem's most painful moments.

弥尔顿要解释，至少要理解,这看起来不可理喻，无法解释的事件,这首诗最悲痛之处正是源于这斯奥迪斯的动力。

耶鲁公开课 - 弥尔顿课程节选

Then we read, or at least we think we read, that Satan's spear is small, and then we realize over the course of this reading process that Satan's spear is unimaginable, and we realize that our time-bound mode of knowing is ultimately inadequate to understand anything about the inscrutable truths of eternity: this is according to Fish.

然后又读到，至少我们认为读到，撒旦的长矛又很小，接着我们意识到了在阅读的过程中,撒旦的长矛实际上是不可想象的，并且我们被特定时代拘束的理解模式,是不足以理解任何,有关永恒的难以预测的真相的：,这是费什告诉我们的道理。

耶鲁公开课 - 弥尔顿课程节选