No one knows for sure why adolescence is unique to humans.
没人确切知道为什么青春期是人类独有的。
No one has come up with a definitive answer as to why this should be so.
至于为什么该这样，还没有人给出明确的答复。
No one knows why they were painted there.
没人知道为什么它们会被画在那里。
No matter why there is growing interest in self help books, it's good to know that help is at hand if we need it.
不管为什么人们对自助书籍越来越感兴趣，知道如果我们需要，帮助就在手边是件好事。
"No one has a good answer" as to why fertility varies among countries, says sociologist Andrew Cherlin of The Johns Hopkins University.
约翰霍普金斯大学的社会学家安德鲁·切尔林说，对于为什么不同国家的生育率不同，“没有人能给出一个好的答案”。
To me, that would have been crucial; after all, I wouldn't tell a child there is no Santa Claus or why I am an atheist without a parent's permission.
对我来说，这却很重要；毕竟，如果没有孩子父母的同意，我绝不会告诉一个孩子，圣诞老人是不存在的，或者向他解释为什么我是一个无神论者。
There is still no universally agreed-on explanation for why there should be such a dramatic cessation of tree growth at the upper timberline.
对于为什么树线以上的树木会突然停止生长，至今还没有一个公认的解释。
Why do the mountains have no names, grandfather?
为什么这些山没有名字，爷爷？
Of the other two choices, "generally rejected by" would provide no contrast, while "antagonistic toward" suggests a relationship that would not explain why music was so widely esteemed.
在另外两个选项中，“普遍被拒绝”不会提供任何对比，而“对立面”则表明了一种关系，无法解释为什么音乐受到如此广泛的推崇。
There's no earthly reason why you shouldn't go.
你完全没有理由不去。
There was no reason on earth why she couldn't have moved in with us.
她不能跟我们一起搬进来根本没有道理。
Deta gave her another blow, but as the child had no idea why, she did not get embarrassed.
迪蒂又打了她一下，但由于孩子不知道为什么，她没有感到尴尬。
She also says there is no reason why a man should walk on the outside of a woman on the sidewalk.
她还说，在人行道上，男人没有理由走在女人的外面。
There is no reason why everyone cannot be welcomed on Mauna Kea to embrace their cultural heritage and to study the stars.
没有理由不欢迎每个人在莫纳克亚山接受他们的文化遗产和研究那里的星星。
Early 20th-century biologists came to a similar conclusion, though they qualified it in terms of probability, stating that there is no reason why evolution cannot run backwards.
20世纪早期的生物学家也得出了类似的结论，不过他们从概率的角度对其进行了限定，称没有理由可以说明进化不能倒退。
The most controversial aspect of Marconi's life and the reason why there has been no satisfying biography of Marconi until now was his uncritical embrace of Benito Mussolini.
马可尼一生中最具争议的方面，以及直到现在都没有令人满意的马可尼传记的原因，就是他对贝尼托·墨索里尼不加批判的信奉。
The complete story of why the center of my ferrule has no black nickel on it would take pages to explain.
为什么在我的金属箍的中间部分没有黑镍这个问题，就得用上好多页纸才能回答清楚。
Now, don't ask me why, because I really have no idea, but the fact is that customers tend to respond really well to MBWA, which is the key reason for its success.
现在，不要问我为什么，因为我真的不知道，但事实是，客户往往对MBWA反应很好，这是它成功的关键原因。
I have no idea why a boomerang is attacking a plant or whether the magical hovering computer monitor is aiding in the attack or fleeing the scene.
我不知道为什么回力镖会攻击植物，也不知道神奇的悬停电脑显示器是在协助攻击还是逃离现场。
"That is no business of mine," said the fiddler, "why should you wish for another husband?"
“这不关我的事，”叫花子说，“你为什么想要另找一个丈夫呢？”
The real reason why prices were, and still are, too high is complex, and no short discussion can satisfactorily explain this problem.
价格过去过高、现在仍然过高的真正原因很复杂，简短的讨论并不能满意地解释这个问题。
People anchor to the information they were given, even though there's kind of no causality or no sort of reason why it should make any difference.
人们总是会对他们所得到的信息产生依赖，即使没有因果关系或没有任何理由表明这种信息会有任何影响。
When it comes to the letter grade on your test or homework, you might notice that there is no letter. Have you ever thought about why that is so?
当涉及到你的考试或家庭作业的字母分数时，你可能会注意到没有字母。你想过为什么会这样吗？
Why do some students give up when they encounter difficulty, whereas others who are no more skilled continue to strive and learn?
为什么有些学生遇到困难就放弃了，而另外那些技巧上并无更多过人之处的学生却继续努力学习？
I've no idea. Why not check the ticket?
我不知道。为什么不查下票？
Why has no one from other planets sent us a message?
为什么没有其他星球的人给我们发送信息呢？
One day, you will wonder why you have no clean socks, and why some of your best friends can cook a delicious meal but you cannot!
将来某天，你会觉得奇怪：为什么你一双干净袜子都没有，为什么你最好的几个朋友可以做出一桌好菜，而你却不行！
When he asks, "Why is there no clean water now?" I feel guilty.
当他问：“为什么现在没有干净的水？”时，我感到内疚。
No doubt that's one reason why digital stickers are used and enjoyed by so many people.
这无疑是表情图被很多人使用和喜爱的原因之一。
That is why many people know different things, but no one has all the wisdom in the world.
这就是为何许多人知道不同的事情，但却没有人能拥有世上所有智慧。
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