没有人知道原因，也没有人愿意去提及这段伤心的回忆。
No one knows the cause, no one wants to mention this sad memories.
至于什么原因，我们无从得知，是否因为一场战争，也可能移动到城市了，或者迁移到了巨大的集体农庄，没有人知道确切的答案。
What was the reason for that - nobody knows; whether it was a war, a sprouting possibility to move to the biggest cities or a policy of kolkhoz sprawling, there is no exact answer.
没有人确切地知道世界上有多少种语言，部分原因是在一种语言和亚语言之间作出区分存在困难。
Nobody knows exactly how many languages there are in the world, partly because of the difficulty of distinguishing between a language and a sub-language (or dialects within it).
就像“典型”哮喘，没有人真正知道究竟是什么原因造成了咳嗽变异性哮喘。
Like "classic" or "typical" asthma, no one really knows what causes cough-variant asthma.
杰克：商业新闻：股票价格上涨，凯伊国际计算机公司的股票涨到两美元，但是没有人知道其中的原因。
Jake: in business news, stock prices are up. International Computer Key Company is up two dollars, but no one knows why.
坏消息是没有人知道确切原因。
没有人能完全确定这其中的原因，也没有人知道它是否将持续。
No one is quite sure why this might be and no one knows if it will last.
当然，由于这一相互作用没有被看到，没有人知道发生了什么，这一结论被称为哈代悖论的原因也在于此。
Of course, since the interaction has to remain unseen, no one should ever notice this happening, which is why the result is known as Hardy's paradox.
没有人知道是什么原因引起缅因号军舰发生爆炸。
No one knew what caused the explosion on the battleship Maine.
每个人都知道，海浪是由于远处的风暴所造成的，但没有人知道他们来自何方及原因，同样也没有人试图预测海浪。
Everyone knew that waves were generated by distant storms, but no one knew where they came from or why, and no one had tried to make surf forecasts.
你还会读到有人冒死救出了他的邻居，但你不会知道这见义勇为背后的原因，因为没有人会怀疑英雄。
What you won't read about are the reasons for this bravery. And that's because...No one ever doubts a hero.
每个人都知道这个道理，并且这也是阻碍很多人追求他们爱好的原因；他们不希望发现没有人关注他们的努力，没有人想购买他们的产品。
Everyone knows this and it’s the reason so many people put off following their passion; they don’t want to find out that no one cares, and no one wants to buy what they have to offer.
但实际上，没有人知道自闭症的真正起因，也没有人知道近年来此类病例上升的真正原因。
But the truth is that nobody knows what causes autism or what exactly accounts for the recent rise in cases.
另一些人生来就对自己有一种消极的倾向，因为他们的外表、残疾，或者没有人知道的原因。
Others are born predisposed to view themselves in a negative light because of their physical appearance, a disability, or for no reason anyone, including themselves, knows.
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
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.
你还会读到有人冒死救出了他的邻居，但你不会知道这见义勇为背后的原因，因为没有人会怀疑英雄。
You can also read about a man who risked his life to rescue his neighbor. What you won't read about are the reasons for this bravery. And that's because... No one ever doubts a hero.
没有人知道进食障碍究竟是什么原因引起的。
没有人知道她们选择离开的原因，她们没有留下只字片言。但我知道，她们都是孤独的孩子。
No one knows the reason that they choose to leave, they didn't leave a word slice speech. But I know, they are all standing alone kids.
没有人会说：“我知道你是梅利莎的女儿，是因为你的眼睛和鼻子和你妈妈很像”其实，性格特点的相似才是背后的原因。
No one says, "I know you're Melissa's daughter because of your eyes and nose" it's the character traits that seal the deal.
我不知道原因。也许除了查理本人之外，没有人知道。无论如何，他说下个月初，他会回来。
I don't know the reason. Probably nobody knows except Charles himself. Anyway he says he'll be back early next month.
我认为也许这就是原因-，没有人知道他们所有的原因是什么。
I think that might be the reason - no one knows what all their reasons were.
肥胖增加了糖尿病发生的风险，但没有人知道具体的原因。
Obesity increases the risk of developing diabetes, but nobody knows the details of why this is the case.
尽管很多国家的恶作剧达人和笑话达人正兴高采烈地准备在愚人节拿爱人和朋友开涮，但没有人知道这种习俗开始的确切时间、原因、甚至地点。
Though pranksters and joke-lovers in many countries now gleefully prepare to dupe friends and loved ones on April Fool's Day, no one knows exactly when or why, or even where, this tradition began.
目前没有人知道是什么原因造成的。
开诚布公地说，没有人确切地知道人为什么梦游，但我们会讨论一些可能的原因。
To be perfectly honest, no one knows exactly why people sleepwalk, but we'll talk about some possibilities.
没有人知道他经常迟到的原因。
失败的原因是，没有人知道间接费用，开始对专属自保中心。
The reason for the failure is that no one knows the overhead cost to start a Captive Center.
失败的原因是，没有人知道间接费用，开始对专属自保中心。
The reason for the failure is that no one knows the overhead cost to start a Captive Center.
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