尽管这些说法可能成立，但它们实际上很难用科学手段证明。

While many of these statements might be true, they are practically impossible to prove scientifically.

youdao

不过电脑实际上很难在如此严寒的温度下运作，而事实上人们也不会再那里呆多久。

It's very tough on computers to actually work somewhere so cold, and people aren't actually there much of the time.

youdao

从区分大小写映射到不区分大小写现在看来是很微不足道的，但实际上很难有效地进行这一映射。

Now it would seem fairly trivial to map from case-sensitive to case-insensitive, but in fact it's hard to do it efficiently.

youdao

They might have to be formulated as very small steps, in order to do that, but you could.

他们那被构造出来，这些过程必须很小，这好像很难，但实际上是可以做到的。

麻省理工公开课 - 热力学与动力学课程节选

It was becoming absolutely impossible, in fact, or at least much, much harder, to claim that there was a single expression of religious truth to which the English nation could consensually subscribe.

实际上，这是绝对不可能的，至少也是很难断言称,这种宗教真理是,整个英国都能勉强赞同的。

耶鲁公开课 - 弥尔顿课程节选

It's a little hard to know what to do with this gazebo. Does it, in fact, represent the nationalist movement that culminated, or one form of which culminated, in the Easter Rebellion?

这个楼台还真的很难理解,难道它实际上代表了，以复活节起义告终的，民族主义运动，或者其，一种形式因之告终？

耶鲁公开课 - 现代诗歌课程节选