We were given: Two hands to hold, Two legs to walk, Two eyes to see, Two ears to listen... But why only one heart?
上帝给我们两只手，两条腿，两个眼睛，两只耳朵，可为什么只有一颗心？
But if improving their hunting luck was the chief motivation for the paintings, it is difficult to explain why only a few show signs of having been speared.
但是，如果增强他们的狩猎运气是这些画的主要动机，那么就很难解释为什么只有少量画作有被长矛刺过的迹象。
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。
In the absence of a style sheet, the sentences appear identical in the browser, but only the second sentence provides information on why.
在没有样式表的情况下，这两个句子在浏览器中看起来是一样的，但只有第二个句子提供了有关原因的信息。
But it is still expensive, especially in terms of energy use, which is why at present it provides only 0.4% of the world's fresh water.
但是脱盐仍然很贵，尤其是从能源消耗方面来看，这也是为什么脱盐在目前只提供世界0.4%的淡水。
Most tools I know of only support the latter (2001) namespace form, which may be why the W3C decided to go back to it, but they did sow a bit of confusion with this namespace change and reversal.
据我了解，多数工具只支持后一种(2001)名称空间形式，这可能是W3C决定回到原来的名称空间的原因，但这种名称空间的变化和撤销确实带来了一些混乱。
This anomaly was documented in the early 1970s, but only now is science beginning to tell us why.
这一特异现象早在1970年代即有论著记叙，然而只是到了现在，科学才开始解说其中原因。
Why were they being forcibly removed to areas with nothing but rows of tin latrines, where only wattles grew in the sand?
为什么他们被强迫搬到一个除了几排铁皮厕所什么也没有的地方，那个地方只有金合欢在沙子里生长？
But such schemes only partly explain why employment in many countries, Germany included, diverged so greatly from output.
但这种政策只能作为一部分原因，解释包括德国在内的一些国家，就业率与商品产量相背离。
But the question remains: Why did we evolve in such a way that certain cognitive functions happen only while we are asleep?
当问题仍然存在：为何我们的进化使得某些认知功能只能在睡眠时候运作？
Japan requires two weeks' notice, which may be why Japanese firms love to use private planes, but only outside Japan: Toyota's corporate-aviation operation is based in California.
日本需要提前两周进行预约，这也可能是为什么日本公司喜欢使用私人飞机的原因，但只是说从日本飞往其他国家。比如丰田公司航空事务部门就在美国加州。
But for now let's simply say that we have a diffraction which we know occurs only by wave-like behavior and it involves the use of x-rays. Why x-rays?
但现在让我们来简单假设一下，我们知道，只波才发生衍射，而且衍射涉及了X光的使用，为什么是X光？
And they help explain why the US grew each year, on average, by 5% in the 1960s, but by only 2% in the 2000s and by only 2.6% if you leave out 2008 and 2009.
这也可以解释为什么美国的平均增长率在六十年代为5%，而到了21世纪头十年只有2%，就算不考虑2008年和2009年，也仅有2.6%。
But if you only need point-to-point message flows between two trusted servers, why not use good old SSL and pass the credential (LTPA in this case) as an encrypted cookie in the HTTP header?
但是，如果您只需要两个受信任的服务器之间的点对点消息流，为什么不使用很好的旧式ssl，并将凭据(在此例中为ltpa)作为加密的Cookie在HTTP标头中进行传递呢？
Dr Cole suspects this could help explain not only why the lonely are iller, but how, in evolutionary terms, this odd state of affairs has come about.
Cole博士怀疑这不但能够解释为什么孤独之人容易得病，而且能从进化的角度这种奇怪的状态时怎么进化来的。
In an April letter to his wife Elsa, he explained why: "my suffering is much, much less since I began to seek after my dream of being free, but not only for me personally."
在4月份，他写信给他的妻子Elsa，他解释到：“自从开始追求我的自由之梦，这个自由就不仅是为了我个人，我受到的磨难也就算不得什么。”
You've already read why programmers might react that way, but what's a manager to do? I'm convinced there are only three options.
您已经知道为什么程序员会有那种反应，但经理应该怎么做呢？
The most compelling andmotivating reason/benefit is almost always the thing you say only afteryou've answered at least three "Yeah, but WHY do I care?"
最有“意义”的理由和好处就是你至少回答过三次“是没错，但关我啥事？”
And that's why we wanted to come again but not only as travelers but in order to do something.
那也正是为什么我们还想再来的原因。不过不仅仅是作为旅行者，而是为了做些身什么。
It talks not only about the mechanics of how to write tests and allow them to drive your code, but also why test-driven programming is such a good thing.
该书不仅讲述了如何编写测试和让这些测试来驱动您的代码的原理，而且还讲述了测试驱动的编程为什么是一种好的编程方法。
It offers not only plenty of examples to the contrary, but also some hints as to how and why empathy evolved, and how it might be related to self-awareness.
它不仅例举了大量的反证，而且还就移情作用的如何演变及其原因，以及如何与自我意识相关等问题提供了指导。
Films are not only passive, but also a medium of the last century: why should we trust them to tell a story about modern conflicts, which are so delocalised, so inhumane, so digital?
影片不仅是被动的，也是上个世纪的媒介：为什么我们要相信他们讲一个关于现代冲突的，如此异于寻常，如此残忍，如此数字化的故事？
So let me be clear about where I stand: not only do I not believe it, but I can't understand why anyone would take comfort from it.
但现在得让我明白我在干什么：我不仅不相信这些，我也不明白为什么还有人能从中得到安慰。
There is no fundamental reason why the US should be the center of the scientific world but for a time it was the only place in the world safe for many scientists.
人们无法从根本上解释为何美国是世界科技的中心，但在当时，美国是世界上许多科学家唯一感到安全的国家。
The author explains how and why Spanish and English have mixed with each other in the United States to create a hybrid language, increasingly used not only in spoken but also in written form.
作者解释了西班牙语和英语如何以及为什么会在美国相互混合，从而创造出一种不止用于口头表达而且诉诸文字的日益流行的杂交语言。
The author explains how and why Spanish and English have mixed with each other in the United States to create a hybrid language, increasingly used not only in spoken but also in written form.
作者解释了西班牙语和英语如何以及为什么会在美国相互混合，从而创造出一种不止用于口头表达而且诉诸文字的日益流行的杂交语言。
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