It's too late for this to be a political poem, but Paradise Lost is late for all sorts of reasons.

要写一首政治诗歌太晚了，但弥尔顿这么晚才写《失乐园》有多方面的原因。

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And as I will explain in a second there are many reasons why this sense hasn't really been elucidated at the molecular level.

难以真正从分子学的角度阐明,这种感官的原因是多方面的,有关这一点,稍后我会另行解释。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

So there are various reasons why it's hard to maintain this collusive agreement.

这样的私下协议难以维系,是有多方面原因的

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There are lots of aspects to it.

这有多方面的原因

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