This fear mechanism is critical to the survival of all animals, but no one can say for sure whether beasts other than humans know they're afraid.
这种恐惧机制对所有动物的生存都至关重要，但没有人能肯定人类以外的动物是否知道自己在恐惧。
Yet no one can say they were not warned.
然而没有人能说他们没有得到预警。
So no one can say that we didn't know.
所以，没有人可以说我们提前并不知情。
No one can say. Whether is a kind of sad.
无人可说。是否是一种可悲。
No one can say how these two trends will play out.
没有人可以说明这两种模式会如何上演。
没人能诉说。
Why it's an essence that so often spoils, no one can say.
而为什么如此本质又经常被糟蹋，没人能说明白。
Today no one can say where Peru's greatest Kings lie.
今天谁也说不出秘鲁最重要的国君埋在哪里。
To be honest, no one can say how many wild boars are in China.
说实话，在中国到底有多少野猪谁也说不清。
But until and unless somebody does the research, no one can say for sure.
但是直到或者除非有人做了这项研究，没有人可以百分百地肯定。
No one can say clearly, friendship in the end is what kind of things.
没有人能说清楚，友情到底是一种什么东西。
No one can say people who drink coffee are better than those who eat garlic.
没人会说喝咖啡的人比吃大蒜的那些人更好。
I put all my emotions in here, just because some things no one can say.
我把所有的情绪都寄托在这里，只因为有些事无人可说。
No one can say, 'You must not run faster than this, or jump higher than that.'
没有人能说，‘你不能跑的比这个更快，或者比这个跳的更高。’
However, no matter what you see, hear anything, no one can say a few words.
但是，不论你看到什么、听到什么，都不可以说一句话。
I said the most trustworthy. As far as being the most honest, no one can say.
我是说最可信赖的，至于最诚实的，没人知道。
The unrest shows no sign of dying down. Yet no one can say for sure how it will end.
但似乎动乱平息的标志并没有出现，现在仍然没有人能肯定这场混乱将如何结束。
No one can say for certain just how she survived the water and the wreckage around her.
没有人能说得清她如何从周围的洪水和废墟中死里逃生。
No one can say for sure; much of the payoff from leadership development is far down the road.
没人能做出肯定回答，因为领导力开发的好处要经过很长一段时间才能显现。
All this means that no one can say exactly how much warming will be avoided by acting on black carbon.
所以这一切措施都意味着没有人能够准确的说出针对“黑碳”采取的行动究竟能够在多大程度上避免气温的上升。
No one can say whether the Alley is on a more solid base this time around, but the new crowd is upbeat.
没有人能说硅巷是否这次有个更坚固的基础，但是这新的群体是乐观的。
No one can say for sure what the acoustical qualities an auditorium will be before itis finished.
一个礼堂完工之前，任何人也说不准它的声学质量会怎样。
As for Maldini, we have to wait for the inflammation to go down and no one can say when that will be.
至于马尔蒂尼，我们必须必须等炎症，没人知道什么时候会好。
No one can say exactly what it looks like when a planet takes ill, but it probably looks a lot like Earth.
没有人能够确切地说如果一个行星出现了问题它将会怎样，但是它看起来可能更像地球。
No one can say for absolute certainty. That's why pay-for-performance Reporter is a valuable tool for you.
没有人会给出绝对的答案，所以我们的这项报告对你来说会是一个很有价值的工具。
How it became so intricately associated with moon worship and the Midautumn Festival — no one can say for certain.
至于月饼是如何辗转地与拜月和中秋节联系在一起的，还没有人能够说得清楚。
How it became so intricately associated with moon worship and the Midautumn Festival — no one can say for certain.
至于月饼是如何辗转地与拜月和中秋节联系在一起的，还没有人能够说得清楚。
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