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。
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。
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。
The most likely is that QED is correct, but has been misapplied in what he describes as a "very difficult calculation".
最可能的是量子电动力学（QED）是正确的，但是在他们所描述的复杂的计算过程中有所疏忽。
Qualitatively there is no doubt that higher taxes have reduced smoking, but with that said, it's very difficult from a statistical standpoint to figure out what caused the real reduction.
从品质上说，毫无疑问，施行高税额已经减少了抽烟现象，但是就是如此说法，从统计学观点来看也很难确定究竟是什么导致了真正的减少。
At the present time it is very difficult for us to say what the TNC is thinking or what their comment is going to be.
他说：“在目前阶段我们难以说明全国过渡委员会的想法，以及他们将作出什么评论。”
Set your course and take the difficult decisions because that is what needs to be done…I think that influence, that character she had, that conviction she had, I think that will be very important.
定下规矩、作出该做的艰难决定，因为那才是该做的事情······我以为，她对后来的影响，她的性格，她的信念，都是非常重要的。
Sometimes, for a new parent, it can be very difficult to work exactly what your baby is crying about.
对于初为父母的人来说，有时候很难弄清楚到底孩子为什么哭。
But measuring these changes in rainfall over the ocean is very, very difficult to do. But salinity is actually an important parameter that gives us an indication of what might be going on.
许多天气预报模型暗示，当气温升高的时候，水循环会发生变化，但是，我们很难在海洋上测量降雨的变化，不过，海洋中的盐分水平实际上是一个重要参数，能表明海洋上降雨的变化。
Taking care of babies is very difficult because they can't tell you what they want.
照顾孩子可真难，因为他们不会说自己想要什么。
This data structure is very complicated, which makes it too difficult to debug what has gone wrong.
这个数据结构非常复杂，很难调试其中出现的错误。
It is actually quite difficult to guess what is going inside her mind. On the other hand, she is very intuitive and can read the mind of the other person very easily.
你要想猜猜她脑袋里在想些什么，确实是够难办的。
And it's a very difficult thing to do because you'll never really know what it is until you attain it.
它的确很难，因为在你到达终点前你永远不知道那是什么。
At times this is very difficult because what they say and what they feel are sometimes not congruent.
有时候，这很难，因为他们所说的和他们所感受的有时候是不一致的。
Only now you are gone do we truly appreciate what we are without, and we want you to know that life without you is very, very difficult.
直到现在你远离我们而去。我们才真正明白你的可贵，我们想让你知道，没有你的日子非常非常难熬。
Only now you are gone do we truly appreciate what we are now without and we want you to know that life without you is very, very difficult.
唯在此刻，当你已离我们远去，我们才真正意识到我们现在损失了什么。我们想让你知道，没有你，我们的生活会是十分、十分困难的。
If there is not the accurate match method, it is very difficult to determine some chromatograph peak represents what material.
如果没有准确的匹配方法，就很难确定某个色谱峰代表何种物质。
If we don't measure enough information to fully describe the mode shape, then it may be very difficult to determine what the cause of the problem is when we blindly limit the data we look at.
如果没有测量足够多的信息来充分地描述模态振型，当盲目地局限于所观察的数据的时候，或许很难确定问题的原因是什么。
It is not very difficult to set up a goal, what is really difficult is how to achieve it diligently.
确定一个目标并不是非常困难的，真正困难的是如何脚踏实地地实现这个目标。
It is very difficult for us to know what to do as we are not his parents.
我们很难决定该怎么办，因为我们不是他的父母。
It is very difficult to imagine what modern communications would be like without the postal service.
没有邮政服务，我们很难想象现代通信会怎么样。
Because embryonic stem cells are so immature, it is very difficult to control what kinds of cells they produce, and the fear is that a tooth could grow inside a heart, for instance.
因为胚胎干细胞没有完全成熟，它很难控制他们将来的类型，比如害怕在心脏旁边长一颗牙齿。
It is seldom very hard to do one's duty when one knows what it is, but it is often exceedingly difficult to find this out.
缦在知道自己的责任时时尽责往往并不困难，但弄清责任何在常常极其费力。
This is going to be very difficult, because all our culture, our tradition, is to compare, justify or condemn what we are.
这必然是十分困难的，因为我们所有的文化，我们的传统就是去比较，判断或谴责我们本来的样子。
This is going to be very difficult, because all our culture, our tradition, is to compare, justify or condemn what we are.
这必然是十分困难的，因为我们所有的文化，我们的传统就是去比较，判断或谴责我们本来的样子。
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