Sometimes it's only when a difficulty is removed that we realise what it was doing for us.

有时候，只有当困难被克服了，我们才会意识到它为我们做了什么。

youdao

Even without the problem of regional differences, rocks present a difficulty as unique time markers.

即使没有区域差异的问题，岩石作为独特的时间标记也是一个难题。

youdao

Never boggle at a difficulty.

切莫见难而止。

《新英汉大辞典》

He returned to Oxford, walking with difficulty because of what he said was a "war wound."

VOA: special.2010.01.03

We were raising a difficulty for the personality theory of personal identity according to which the key to being the same person is having the very same ongoing,evolving personality.

我们给判断个人认同感的人格理论,也就是说判断是否是同一个人取决于,是否具有同样的形成中的人格这理论。

耶鲁公开课 - 死亡课程节选

Sometimes when I am traveling in America, people have a difficulty understanding me.

有时候，当我在美国旅游的时候，人们要理解我，会有一点困难。

有趣的澳大利亚英语 - SpeakingMax英语口语达人

One of the minor symptoms of the problem is a difficulty in detecting visual motion.

ECONOMIST: Reading minds | The

There was a difficulty with the bill which was keeping us from generating any more Republican support.

CNN: Related Stories

However, Mr Justice Treacy disagreed and said they went beyond mere advice or information aimed at resolving a difficulty.

BBC: Minister's planning changes ruled unlawful