造成这种现象的原因尚未彻底弄清。

The causes of the phenomenon are still incompletely understood.

《牛津词典》

通常来说，导致这个现象的原因有几个。

Generally speaking, there are several reasons accounting for this phenomenon.

youdao

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。

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

youdao

And it follows qualitatively from just your ordinary observations a bout the direction in which things go spontaneously, right.

定性地来说,就是你们日常生活中观察到,自发进行的物理现象,会有方向性。

麻省理工公开课 - 热力学与动力学课程节选

But what if of certain abusive families and any religious background in location who really confine women to their home?

但是，如果在某些发生虐待现象的家庭里,有着某种宗教背景,而这种宗教背景又允许监禁妇女的情况发生呢？

普林斯顿公开课 - 人性课程节选

They're actively engaged in the material, actually seeing the phenomena, by making measurements of real world experiments.

学生们能自主地参与到物质中，看见真切的现象，通过对真实世界实验,做出测量。

麻省理工公开课 - 媒体、教育、市场课程节选