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。
Astronomers used to ask why only Saturn has rings.
天文学家们过去一直感到奇怪，为什么只有土星有光环。
The question is why only a small fraction of supernovae produce GRBs.
问题是，为何只有一小部份的超新星会产生GRB ？
It's a high bar, which is why only a fraction of movies ever made are available on DVD.
这些条件形成了一个很高的门槛，这就是为什么只有很少一部分的电影制成了DVD。
The officer's later met and asked: "by the people of foot down, why only your long-term misery?"
那差官见了和氏以后问道：“天下受砍脚之刑的人很多，为什么唯独你长期悲痛不已呢？”
Further research from Microsoft also reveals why only some organizations insist on very complex passwords.
来自微软的进一步研究同时披露只有很少组织坚持使用非常复杂的密码。
This scenario may explain why only 10% of active galaxies have radio jets, and how active galaxies evolve over time.
这种假设或许可以解释为什么活跃星系中只有10%存在喷流，以及它们如何持续演变。
This may explain why only a percentage of patients benefit from a treatment even though they all have the same cancer type.
这可以解释为什么同一类型的肿瘤中只有部分病人能够受益于某种治疗。
It is unknown why only a minority of circulating tumor cells trapped in lung capillaries form metastases and involvement of immune cells remains uncertain.
为什么只有少量循环肿瘤细胞进入肺毛细血管形成转移还不清楚，其中涉及的免疫细胞也不确定。
Have a hearty delicious breakfast that fills you up and makes you feel strong, why only eat well on the weekends? Community: When Emotional Eating Is a Good thing?
吃一顿丰盛的早餐填满你的胃，让你感觉精力旺盛，何必只在周末吃大餐？
For instance, it's still not known why only some chiton species have eyes, or how the creatures are able to use the same material to make both their eyes and their shells.
例如，为什么只有一些特定种类的石鳖才有眼睛，还有它们是如何用同一种物质构建眼睛和甲壳的。
In short, it is the score and not the libretto that keeps the work alive and fresh; and this is why only musical critics should be allowed to meddle with Shakespeare - especially early Shakespeare.
简而言之，使一件作品鲜活起来的是旋律而不是歌词，这就是为什么应该仅容许音乐评论家们去干涉莎士比亚，尤其是早期的莎士比亚。
Why dose a whole field with chemicals if you can spray only where they are needed?
如果你可以只在需要的地方喷洒化学药品，为什么要在整个田地里喷洒呢？
With this in mind, Ralph lames, physicist at the University of Western Australia in Perth, thinks he may have discovered why whales turn up only on some beaches.
考虑到这一点，珀斯西澳大利亚大学的物理学家拉尔夫·拉梅斯认为，他可能已经发现了为什么鲸鱼只出现在一些特定海滩上。
This discovery explains why Kalinese miniature statues were abstract and entirely different in style: molds could be used only for life-size sculptures.
这一发现解释了为什么卡利尼斯微型雕塑是抽象的，而且风格完全不同：模具只能用于真人大小的雕塑。
However, this is not the only reason why students dislike their libraries being open to members of the public.
然而，这并不是学生们不喜欢他们的图书馆向公众开放的唯一原因。
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。
Only about one-in-five say women's family responsibilities are a major reason why there aren't more females in top leadership positions in business and politics.
只有大约五分之一的人认为，商界和政界高层的女性领导不多主要是因为女性的家庭责任。
That's why I only paint on the bottom half of the paper.
这就是为什么我只在纸的下半部分画画。
I only asked, "Why are you shouting at me?"
我只是问问：“你为什么对我大喊大叫？”
Riding a bike with only one wheel is a balancing act—that's why unicycles are used in the circus.
骑着只有一个轮子的自行车是一种平衡表演——这就是为什么独轮车被用于马戏团的原因。
Why do we only need the inbound custom login module?
为什么我们只需要入站自定义登录模块呢？
Why should those choices only involve spending cuts?
为什么这些选择仅仅在削减开支上？
The authors looked to evolution to understand about why humans are only as smart as we are and not any smarter.
这两位作者关注着进化为了明白为什么人类只像我们现在这样聪明而不是更加聪明。
The authors looked to evolution to understand about why humans are only as smart as we are and not any smarter.
这两位作者关注着进化为了明白为什么人类只像我们现在这样聪明而不是更加聪明。
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