But testing these theories is hard, so nobody knows if they are true.
然而，验证这些理论相当困难，因此这些理论正确与否无人知晓。
It has been celebrated for so long, but nobody exactly knows how it started.
人们已经庆祝它很久了，但没有人确切地知道它是如何开始的。
You know, dears, in the old countries there are many fine stories about things which happened so very long ago that nobody knows exactly how much of them is true.
朋友们，你们都知道，在那些古老的王国里总流传着很多传奇故事。 这些故事流传了很久很久以至于没有人知道这些故事当中哪些真的发生过。
Few African countries have a cancer registry, so nobody really knows the rates of various cancers.
非洲少有国家对癌症进行登记，因此没人知道真正各种癌症的发病率是怎样的。
Nobody knows who it is, so they call it, they find it wandering on the streets.
没人知道他是谁，他流落街头。
In fact, so little is known about the violent Sentinelese people that nobody even knows what they call themselves, or even what language they speak.
实际上，对于凶猛的sentinelese族人我们知之甚少，都不知道他们自己怎么称呼自己或者他们说什么语言。
Nobody knows exactly why they were so well preserved.One possibility is that the creatures were buried quickly and in conditions that were hostile to the decomposition of soft body parts by bacteria.
人们还对叶岩保存如此完好百思不得其解，有一种可能性是在化石在形成之时，古生物被迅速掩埋，而当时的环境并不适合细菌分解这些生物的软体部分。
Nobody knows exactly why they were so well preserved. One possibility is that the creatures were buried quickly and in conditions that were hostile to the decomposition of soft body parts by bacteria.
人们还对叶岩保存如此完好百思不得其解，有一种可能性是在化石在形成之时，古生物被迅速掩埋，而当时的环境并不适合细菌分解这些生物的软体部分。
Nobody knows for sure why humans lie so much, but studies find that it's common, and that it's often tied to deep psychological factors.
没有人确切的知道为什么人类撒谎如此频繁，但是研究发现这种现象很平常，并且这种行为通常与深层的心理因素有关。
They don’t really know how to express it correctly so nobody else knows how to accept it so they lock them away in a psych ward.
他们不知道怎么正确地表达自己的感情，所以没有会明白他们、接受他们，因此，正常的人就把他们关进了精神病院。
Nobody knows you, so what's the difference?
又没人认识你，怕什么？
The source added: 'Whenever Ojani tries to do something Jennifer just tries to block it any way that she can - nobody really knows what she's so paranoid about.
不论诺阿做什么，詹妮弗总是竭力阻止。天知道她为什么要如此偏执！
The source added: 'Whenever Ojani tries to do something Jennifer just tries to block it any way that she can - nobody really knows what she's so paranoid about.
不论诺阿做什么，詹妮弗总是竭力阻止。天知道她为什么要如此偏执！
Nobody knows why he shouted for so long.
谁也不知道他为什么喊了那么久。
Because nobody knows our company and products before, and our many competitors are advertising also, so our advertisement will not be noticed unless we advertise more than our competitors.
因为之前没人知道我们的公司，知道我们的产品，我们的很多竞争对手也做广告，所以我们的广告不被人注意，除非我们的广告多于我们的竞争对手。
Nobody knows I've done this, so please don't give me away!
没有人知道我做了这事，千万别把我出卖了！
But shes so young, and nobody knows her! Nobody.
可是她太年青了，并且没人知道她！没有人。
Nobody knows their true power, so countries must prepare for the worst.
没有人确切知道它的威力，所以各国必须做最坏的打算。
Nobody knows what he thinks, so he has decided to give a speech that will show his attitude towards the coming election.
没人知道他想什么，所以他决定举行一次演讲，（以便）表明他对于即将到来的选举的态度。
And nobody, knows, so still it flows.
谁，能知道，它在如此寂静地淌着。
But she's so young, and nobody knows her! Nobody.
但是她太年轻了，而且没人知道她！没有人。
So, how deep in the hole is the US state and local government? The truth is, nobody knows. The states report their liabilities in strange ways, often ignoring accounting conventions.
事实是，没有人知道，且美国在报告他们的债务时，以奇怪的方式呈现，他们忽略会计惯例。
Today the country is so secretive that virtually nobody, including U. s. intelligence agencies, really knows what goes on inside its borders.
今天，该国太神秘了，以至于实际上包括美国情报机构在内，几乎没有人真正了解在其国内发生了什么。
Today the country is so secretive that virtually nobody, including U. s. intelligence agencies, really knows what goes on inside its borders.
今天，该国太神秘了，以至于实际上包括美国情报机构在内，几乎没有人真正了解在其国内发生了什么。
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