As Posner emphasizes, it is very difficult to estimate with any precision what is the actual probability of highly infrequent events, and such a leak would fall within this class.

正如波斯纳强调的，要精确估计高度偶发事件的实际发生概率是非常困难的，这次的漏油事件就是属于这类事件。

youdao

With rumours on the Internet spreading like wildfires, it has been very difficult to ascertain what is real and what is just speculation.

传闻在网络上迅速传播，已经很难确定哪些是事实哪些仅仅是揣测了。

youdao

This study is telling us that it is the structure of our lives that makes it very difficult to do what doctors recommend.

这个研究告诉我们这是一项医生们都会建议但我们又很难做到的生活结构问题。

youdao

So it's very difficult, but what I come down to is that you just have to place your energy on your breath, and every time you notice your awareness drifts to somewhere else, you have to recognize this drift and let it go.

因此这很难，但我总结的方法是,只需要把能量集中到呼吸上，每次注意力不集中,飘到别处时，要意识到意识的涣散，并放手不管。

普林斯顿公开课 - 人性课程节选

it's very difficult when one is so articulate and is able to express exactly what you want to say,

当一个人已经熟谙一门语言，能够用这门语言清楚明白地表达意思，

想学好英语吗？ - SpeakingMax英语口语达人

But I would just say, again, our efforts are really working to help the Japanese people deal with what is a very difficult and really tragic situation.

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"I would hope and expect to see changes in operational practice and in the way in which police engage with families in what is a very difficult but important situation where you are dealing with high risk, vulnerable people who are missing, " Dr Maguire added.

BBC: Police disciplined over James Fenton investigation

What I liked most about The West Wing -- and what was most realistic to me -- was that instead of portraying people in Washington as either cynical or naive, our boss, Aaron Sorkin did a great job at portraying serious and deeply committed and well-intentioned people trying to do good things in what is a very difficult, complex and political environment.

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