They did hunt and they also raised cereal crops and kept sheep, but we don't know why so many of the paintings are of hunting scenes.
他们确实狩猎，也会种植粮食作物、饲养绵羊，但我们不知道为什么有这么多画与狩猎相关。
Based on excavations, we can know the layout of the houses and the location of the graves, but we're only guessing when we tried to say why they did it that way.
根据挖掘的情况，我们可以知道房子的布局和坟墓的位置，但是我们试图解释他们这样做的原因时只是瞎猜而已。
I don \ \ \ \ \ \ \ 't know why we always eat spicy food, but it \ \ \ \ \ \ \' s good for our health because it has a lot of herbs.
我不知道我们为什么总是吃辣的食品，但是这是有益于我们的健康的，因为它许多都是药草。
I don't know why we always eat spicy food, but it's good for our health because it has a lot of herbs.
我不知道我们为什么总是吃辣的食品，但是这是有益于我们的健康的，因为它许多都是药草。
The researchers say they found a link between being overweight and having a poorer memory, but we don't know why.
研究人员表明他们发现体重超重和记忆力差之间的联系，但我们并不知道为什么如此。
So now we know that the brain is truly noisy, but we still don't know why.
所以现在我们知道大脑确实是很嘈杂的，但我们仍然不知道原因所在。
We do not know why this error has occurred, but it is regrettable that the claimed drastic reduction in the extent of ice in Greenland has created headline news around the world.
我们不知道为什么这个错误会发生，但是，令人遗憾地是，格陵兰岛延伸的冰大幅减少的宣称已经导致了世界各地的头条新闻。
We don't know exactly why the pain occurs, but it can be very debilitating — to the point that patients decide to stop taking aromatase inhibitors.
我们不知道疼痛发生的准确原因，但是这种疼痛使人变得很虚弱，以至于患者会决定停止服用芳香化酶抑制剂。
I think we can celebrate his life, but we can't be settled with his death until we know, who, what, when and why.
我认为我们可以庆祝他的生命，但是只有当我们知道是谁以怎样的目的在什么时候将他杀害，我们才能解决他的死亡之谜。
"We don't yet know why these differences occurred, but plan to studyit in the next year, " he said.
“我们仍不明白引起这些差异的原因，但我们计划下年来研究这个问题，”他说。
Scientists don't yet know why dogs fail this test, but it may be because "we train them to look at our eyes and face and not to follow our gaze," says Range.
科学家们现在还不知道为什么狗反而会在测试中失败，兰奇认为可能是因为“我们训练狗注视我们的眼睛以及面部，而不是追随视线。”
We have to resolve the problem with our away form. As I said, I don't know why it happened this season but next year we will make sure things change.
我们必须解决关于客场状态的问题，我不知道为什么这个赛季会这样，但是下个赛季一定会有所改变的。
Why is it we don’t always recognize the moment when love begins, but we always know when it ends?
为什么我们总是意识不到爱情何时开始，却总是知道何时结束？
Do you put off doing things that would bring you closer to your desired goals? I know I do. But why are we so foolish?
你会拖着去做一件让你接近你希望目标的事情吗？我就总是这样。为什么我们这么愚蠢呢？
Why that is, is still up in the air, but we know a little bit and quite a little bit these days about the molecular and cellular biology that underlies exercise.
原因仍不为我们所知，但是这些天来，我们对锻炼背后的分子生物学以及细胞生物学稍稍有所了解。
"The [Sun's] corona has a temperature of 2 million degrees but we don't know why it is so hot," she said.
“日冕的温度高达两百万度，但是我们不知其原因，”她说。
William Shakespeare is a really greatest writer in history, but we have read his works. Why do we still want to know anything about him?
威廉·莎士比亚的确史上一大作家，但是我们读了他的作品了，为什么还要知道他的任何事情呢？
We know that these events are among the most cataclysmic that the sky holds; but we understand only-and approximately-the how, not the why.
我们知道这些偶发事件是在天空拥有的最大的灾难；但我们仅仅——大概了解——只知其然，却不知其所以然。
I don't know why this insight showed up in my brain. But I guess we could ask the same of many authors and speakers. Who is this one or that one to know what they know?
我不知道为何这些认知会在我脑海中浮现，但我想我们也可向许多作家和演说家问同样的问题，到底哪种人才真正清楚自己的所知与无知？
We want to know why so many search engine companies always discuss how they can make more money from advertisements but not propose a perfect solution for us.
我们想知道，为什么如此众多的搜索引擎公司都只是想着如何从广告中获取更多的利润，而不为我们提供一个完美的解决方案。
At the time, we don't always understand why things are happening, but when we look back, we know it was providence.
在当时我们总是不明白有些事情为什么会发生，但是过后当你回想起来，我们会知道那是天意。
We all know we can't live without water, but just why is it so important?
我们都知道我们不能离开水，但是为什么它如此重要呢？
But we don't really know why or how. Researchers in Canada and the UK may have just found the key.
但我们并不知道原因和过程，而加拿大和英国的研究者们，也许刚好找到了问题的关键。
But what we don't know is why they become susceptible to this host of pathogens, viruses and fungus.
但是我们没有弄明白的是为什么蜜蜂们会对这些病原菌，病毒和真菌这么敏感。
The trooper aims his gun up into the mist above Josh, hoping to hit the source of the tentacles, but Grace stops him from firing. We don't know why yet.
士兵用枪对准杰克上方的薄雾希望能击中触角的来源但格蕾丝斯阻止他射击。我们也不知道为什么。
I don't know why but we all started screaming and ran out into the yard.
我不知究竟是什么原因，但我们都还是尖叫着跑到院子里。
We've now learned different, but to benefit from this lesson, there's something we need to know. Just why has The King's Speech been such a success?
现在英国人打开了眼界，但为了从此经验中受益，英国人还需要知道：为什么《国王的演讲》如此成功？
"We've observed the results — clumping under conditions of low relative humidity — but we really don't know why it happens," she noted.
“我们在低湿度条件下倾倒饮料观察到结果，但我们不清楚它是如何发生的。”她指出。
When we know something is good for us but we do not do it, it is logical to ask why.
当我们知道某些事情对我们是好的，但是我们不做时，理智的询问为什么。
When we know something is good for us but we do not do it, it is logical to ask why.
当我们知道某些事情对我们是好的，但是我们不做时，理智的询问为什么。
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