但其原因比较复杂。

But their reasons are complex.

youdao

有很多原因可以解释该问题。就我而言，我认为以下原因比较典型。

There are many reasons explaining this case. As for me, I regard the following as the typical ones.

youdao

造成这种故障的原因比较多，笔者在这里可以给大家提供一个简单的解决办法。

This resulted in more failure, I can tell you here to provide a simple solution.

youdao

That's why we always talk about irreversible expansion, because it's easy to write down an irreversible expansion.

这就是我们总是,讨论不可逆膨胀的原因，因为它,比较容易描述。

麻省理工公开课 - 热力学与动力学课程节选

I'd like to talk about the leading causes of death and we'll compare leading of causes of death in 1900 to leading causes of death today.

现在我们要探讨一下死亡的主要原因,并且将1900年和,现在的主要死亡原因做个比较

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The government has liberized the economy and that has of course been playing a role but the growth acceleration started almost a decade before that, so the factors are a little more complex.

印度政府让经济自由发展,这一决策显然是起了作用的,但在这一决策出现约10年前,印度经济的加速发展便开始了,所以经济腾飞的原因还比较复杂。

普林斯顿公开课 - 国际座谈会课程节选