Scientists do not know why dinosaurs became extinct.
科学家不知道恐龙为何绝种了。
Her friends started falling away and she did not know why.
她的朋友开始疏离她，她又不明就里。
But if you do not know why I am saying it, it proves my case further.
但如果你不知道我为什么这么说，那就进一步证明了我的猜测。
Scorpions glow under ultraviolet light, but scientists do not know why.
蝎子在紫外线的照射下能发光，但是至今科学家还没解开这个谜。
After all, how can you know that the project is blowing up but not know why?
毕竟，你怎么会知道项目搞砸了但是不知道为什么呢？
This was an innate eccentricity and love of embroidery, i do not know why .
这是我们固有的一种怪癖，喜欢修饰，究竟如何，我就不知道了。
We find our dating relationships crumbling to pieces and we do not know why.
我们发现我们的约会关系瓦解成碎片，我们不知道为什么。
Do not know why I still wanted to write, I would like to leave something here.
可不知道为什么我却还是想写，想在这里留下些什么。
I do not know why tell these things with you, but I can see her shadow from you!
我不知道为什么要告诉你这些事情，但是我能从你身上看到她的影子。
I do not know why, as long as you are in me, my heart is no longer on tenterhooks.
不知为什么，只要有你在我身边，我的心便不再惶惶不安。
He did not even take part in last year's national championships. I do not know why.
他甚至没有参加去年的国家锦标赛，我不知道什么原因。
A Cole Porter song, In the Still of the Night, goes through my head. I do not know why.
不知何故，我的脑海中浮想起了科尔·波特的歌《静夜》。
Researchers % do not know why people think some colors are warm and other colors are cool.
研究人员现在还都不知道，为什么人们认为有些颜色是暖的，而另外一些颜色是冷的。
Abdication worked fast a month, why is my psychology always confused confused? Do not know why?
辞职工作了快一个月了，为什么我的心理总是慌慌的?不知道为什么?。
This is very good. Thanks. But I do not know why they like to establish their company in China.
这很好，谢谢，但是外国人怎么利用这些喜欢在中国开公司，我不是很明白。
He said he did not know why major life events appeared to have different effects on men than women.
他声称，他仍无法弄清人生重大事件变化为什么对男人与对女人影响有所不同。
I admit I do not know why average degree of happiness has not risen in recent decades in the US as incomes rose.
我承认我的确讲不清为什么美国的平均幸福度在最近几十年没有随着收入的增加而提高。
Siyu did not know why she imagined that; it was as unfounded as all the other things she had made up about him.
思玉不知道她为什么会这样想，其实她对他一无所知。
I was walking by the road, I do not know why, when the noonday was past and bamboo branches rustled in the wind.
我在路边行走，也不知道为什么，时已过午，竹枝在风中簌簌作响。
Certainly I did not know why I had to come here, but I knew that I would at least not be starving to death if I stayed here.
当然，我也不知道我为什么要来到这里，但我知道我在这里还不至于饿死街头。
If you want to express a feeling of surprise, you might cry "holy mackerel!" although we do not know why a mackerel is holy.
如果你想表达一种惊奇的感觉，你会大叫“好家伙”，尽管我们不知道为什么鲭鱼是神圣的。
We do not know why the accident happened. So far we have no names of any people on the trains. We will have more for you at 2:30.
我们还不知道这场事故是怎么发生的，到目前为止我们没有乘坐地铁的人员名单。我们会在2：30做最新报道。
Anthropologists do not know why one culture develops one type of time-space perception and another culture develops another type.
人类学家不知道为什么一种文化会产生一种时空观，而另一种文化却会产生另一种时空观。
They also do not know why the extra brain activity, at least during the first phase of deep sleep, is always on the left hemisphere.
他们也不知道为什么这额外的大脑活动总是发生在大脑左半球，至少第一晚的深睡眠阶段是如此。
When we set out on an extended travel by ourselves, we may not know why we are going when we begin, and it may only be clear when we come back.
当我们动身做长期旅行时，开始我们也许不并知道为什么这样做，但我们回来时答案变得透彻明了。
Just now she suddenly said she met a car accident today on the line by QQ, I do not know why I have suddenly become very concerned about her?
刚刚她突然在QQ上告诉我她今天看到了一起交通事故，不知道为什么我突然这么担心她！
Just now she suddenly said she met a car accident today on the line by QQ, I do not know why I have suddenly become very concerned about her?
刚刚她突然在QQ上告诉我她今天看到了一起交通事故，不知道为什么我突然这么担心她！
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