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。
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.
为什么作者说无聊并非只有坏处？
只有心理学家才会问这样的问题：为什么我们高兴时微笑，而不是怒容满面？
The psychologist alone can ask such questions: Why do we smile when pleased and not scowl?
这就是为什么即使现在熊也只有短短的尾巴，整个冬天都冬眠，而且一点也不喜欢狐狸。
It is that even to this day bears have short tails, hibernate all winter, and have no love at all for fox.
你失败了一次又一次，为什么你脸上没有痛苦，只有快乐？
You failed again and again, why don't you have pain but happiness on your face?
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。
Riding a bike with only one wheel is a balancing act—that's why unicycles are used in the circus.
为什么一个70岁的老人可以保持良好的状态来完成马拉松，而大多数年龄只有她一半的人却不能完成？
Why can a 70-year-old stay in good condition to complete a marathon, while most people half her age couldn't finish?
只有这样才能解释为什么需要在修正案中明确提到共同权力。
Only this would explain the need for an express reference to concurrent powers in the Amendment.
那么为什么从那时候其这些问题只有增加呢？
Why then have these problems only increased since that time?
神秘加深了：为什么只有三种类型？
为什么这个程序使用了方面后，它的运行速度只有一半了呢？
Why is the program running only half as fast with the aspect applied?
而且如果说有多个光源的话，为什么每个物体只有一个影子呢？
And if there are multiple light sources, why does each object only cast one shadow?
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 scenario may explain why only 10% of active galaxies have radio jets, and how active galaxies evolve over time.
只有当话筒放在前面中间的那个在笑的男人时，你才会明白为什么这个视频会搞笑。
It's only when the microphone is put in front of the laughing man in the middle that you understand why this video is so funny.
人们在古罗马时期销售丧葬险,你可能会想,为什么只有丧葬险
They were selling that in ancient Rome, but you might think, but why just for burial?
毕竟，你的生日一年只有一次，为什么我要躲避呢？
After all, your birthday only comes around once a year, and why should I be hiding away?
教授：如果选民只有10个人，好，为什么那会帮助你们评价论点？
Prof: if the electorate was just 10 people, okay, why would that help you evaluate the argument?
这就是为什么只有他从不争夺皇位。
That is why he is the only one who has never fought for your throne.
我不知道为什么只有一些网页提供了这种在线测试的服务。
I wonder why there are just few web sites offering online quiz like that.
这或许就是为什么该网站上在售的书只有大概300种吧。
Maybe that's why you will find there are only about 300 book titles on the website.
只有真正的电脑迷和电脑虫知道为什么。
如果所有水果都是营养源，为什么在民间传说只有苹果？
If all fruits are nutritional powerhouses, why are apples the only one to be included in the folklore?
可贵的东西世间稀少-这正是为什么属于你的只有我一个。
Precious things are very few-That must be why there's just one foryou.
为什么在我所读的东西里，只有荷兰是列为，在这方面完全平等的。
Then why is it in all the things I read, it is only the Netherlands is sited as being completely egalitarian in this respect.
为什么您绝不能作FYI(只有自己能听懂的)演讲。
为什么您绝不能作FYI(只有自己能听懂的)演讲。
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