It is no easy task to identify the reasons for this phenomenon which involves several complicated factors.

要找出这一现象的原因并非易事，因为它涉及若干复杂的因素。

youdao

This interpretive framework, which once dominated antislavery historiography, had been discounted by historians for two basic reasons.

这种解释框架曾主导过反奴隶制的史学，但由于两个基本原因，它已被历史学家所忽视。

youdao

There're two reasons for this: first, they live in the active layer, which, remember, contains water that doesn't penetrate the permafrost.

造成这种情况的原因有两个：首先，它们生活在活动层中，请记住，活动层中包含的水不会渗透永久冻土。

youdao

"I think there are many who realize that constantly imposing demands on the Iranians which they either have no intention or the capacity to fulfill for domestic political reasons has not gotten us very far over the last three or four years,".

VOA: standard.2009.10.19

Now this passage is famous for a lot of reasons, not least of which is that it's wonderful.

这篇文章在今日如此出名有很多原因，不仅是因为它本身很精彩。

耶鲁公开课 - 弥尔顿课程节选

The reason for that is two reasons: first, I want to run it as a workshop, in which you involve and participation.

这样是因为：,首先，我想把课上成一节讨论课，让大家积极参与。

麻省理工公开课 - 电影哲学课程节选

Despite the small number of genes which made it through, the Neanderthals did go extinct in Europe, western Asia and Siberia - for reasons which remain unclear.

BBC: So we're part Neanderthal. What now?

In the hours before Manchester United's Champions League tie, Rooney issues a statement timed for maximum impact which outlines his reasons for leaving.

BBC: How the Wayne Rooney saga unfolded

Rosen credit for taking the time to thoughtfully address the very reasons for which he apparently was targeted in the first place.

FORBES: Ambushed