They all fell silent, looking rather scared; the problem facing them seemed insurmountable.

大家沉默了，看上去都非常担；面临的困难似乎难克服。

The enemy's attack was more formidable than we had expected.

这敌人的攻击较我先前所预测的要难克服。

These are all very difficult factors to overcome from the perspective of any outside invader.

从任何外部入侵者的角度来看，这些都非常难克服的因素。

Well, phobic states often develop into severe crippling challenges that can be very difficult to overcome.

恐惧状态通常会发展成严重的，难克服的挑战。

But the challenge did not seem to leave anyone flustered, insuperable obstacles being standard in paleontology.

不过古生物学对难克服的阻碍见怪不怪，所这挑战似乎没有让任何人感到慌乱。

Even for 21st-century industrialized civilizations, jungles and rainforests proved difficult to overcome because building infrastructure through them is a significant challenge.

即使对于 21 世纪的工业文明来说，丛林和雨林也难克服的困难，因为在丛林和雨林中建设基础设施巨大的挑战。

What formidable obstacle is she now to bring forward?

她现在又要拿出什么难克服的理由呢？

But look, there's an energetic cost to interstellar travel, which is really hard to overcome.

但要知道，星际旅行存在巨大的能量消耗，这实在难克服。

And I think that DNA was too strong to overcome disruptive innovations.

我认为那种基因过于强大，难克服颠覆性创新。

And that's always been something that I've struggled with.

这始终我难克服的点。

And then I know the $43,000 or $44,000 seems insurmountable.

我知道那4万3千或4万4千美元看起来难克服。

Family, education, literacy, opportunity, that becomes very hard to overcome.

家庭、教育、识字率、机会，这些变得非常难克服。

Like, this is going to be a hard one to get over.

这会个难克服的难题。

Gradually Ronald's insistence became less difficult to overcome.

渐渐地，罗纳德的坚持变得不那么难克服了。

One idiosyncrasy for which she often apologized, she found it excessively difficult to conquer.

她经常为此道歉的种特质， 她发现它非常难克服。

And that's can be tough to get past at times.

有时候，这确实难克服。

Like, that's a little bit harder to get over.

就像，这有点难克服。

The minuses can seem equally formidable.

缺点同样显得难克服。

And with debt payoff, it seems like that is still a hard thing to get over.

在偿还债务方面，似乎这仍然个难克服的难题。

I worry about him fighting through what he's got to fight through at the catch point.

我担在接球点上难克服必须面对的困难。