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。
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。’
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。
MASTER: "no one can say with finality that God is only 'this' and nothing else."
师父：“没有人能够对神作出定论，说神只是‘这’，不是其他。”
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。
While no one can say how long the crisis will last, what we find on the other side will not look like the normal of recent years.
没人能肯定这场危机将会持续多久，相反的我们发现近些年来看起来并不是正常状态。
No one can say whether or not having surgery earlier would have made any difference because of the possibility of micrometastases.
由于肿瘤的存在微转移的可能性，没人知道早做手术于晚做手术是否会带来不同的结果。
No one can say that Milan-Manchester United is unrepeatable because it actually resembled the Milan 5-0 Real Madrid match quite a bit.
没有人能说米兰对曼联的比赛是不可复制的，因为这场比赛和米兰5-0大胜皇马的比赛极其相似。
I'm still quite confident that the higher up you go in the Swedish court system, the more fair you get and no one can say this is a fair judgment.
我相信在瑞典的法庭有走得越高你得到的判决就越公正，而没有人能说这是一个公平的判决。
No one can say which brand will work best for you or feel best on your feet, so you have to rely on your experience and on the feel of each pair as you shop.
没人能保证哪个牌子最适合你或者你穿着最舒服，因此当你买鞋时，必须依靠你的经验及你试穿鞋时的感受。
No one can say for sure why the FDA has ignored repeated pleas from Congress, beekeepers and the honey industry to develop a U.S. standard for identification for honey.
没有人知道FDA无视国会、养蜂人和蜂蜜行业一再请愿要求建立鉴定蜂蜜统一标准的确切原因
In general, supplying and using this software is illegal in the wider market, but no one can say for certain how many groups have illegally gained access to the technology.
不过目前为止，在市场上大范围公开出售这种破解技术仍属非法行为，但不可避免地会有一些经过非法渠道获得这种破解技术的团体。
The flare was presumably caused by sunlight glinting from some flat surface on the shuttle-shaped spacecraft, but no one can say for sure because it is a classified mission.
闪耀的现象可能是阳光照在梭状太空船的某些平整表面造成的，但也不能肯定。因为这是军事机密。
Oil is back up to $106 per barrel, and no one can say how developments in the Middle East might affect that price in the months to come. Europe remains an issue, as I noted this morning.
石油价格再次增长，每桶达106 美元，没人说得准，未来几个月中东局势变化会对石油价格造成怎样的影响。
I am sure that no one can say that the whole is to carry forward the spirit of Yu Gong Yi-Shan, the next generation and to future generations to eat, also said too many incomplete Why?
我可以肯定没有人能说全了，就是发扬寓公移山的精神，子子孙孙挨着辈吃也说不全说不完，为什么呢？
No one can say truthfully that they would not have committed such crimes if placed in the same circumstances, he said. "We didn't know the depths of depravity into which we can descend."
坦白讲，没人敢担保自己处在类似情境中不会犯下同样的罪行，他说，“我们并不知道自己到底能堕落到什么地步。”
No one can say that life with childhood, manhood and old age is not a beautiful arrangement; the day has its morning, noon and sunset, and the year has its seasons, and it is good that it is so.
人生被分为童年、成年和老年，谁也不能否认这是一个美妙的安排；一天中有清晨、正午和日落，一年要有四季之分，这样的安排才好。
No one can say that life with childhood, manhood and old age is not a beautiful arrangement; the day has its morning, noon and sunset, and the year has its seasons, and it is good that it is so.
人生有童年、少年和老年，谁也不能否认这是一种美好的安排，一天要有清晨、正午和日落，一年要有四季之分，如此才好。
No one can currently say where the new jobs are coming from or when, and any sensible company or country should prepare for all alternatives.
目前，没有人能说出新工作岗位来自哪里或何时出现，任何明智的公司或国家都应该为所有替代方案做好准备。
No one in the book industry can say with any confidence what will happen to the book, as we've known it.
正如我们所知，在图书行业中，没有人能有把握地说出这本书会发生什么变化。
No one in the book industry can say with any confidence what will happen to the book, as we've known it.
正如我们所知，在图书行业中，没有人能有把握地说出这本书会发生什么变化。
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