但即使一直充着电，手机也无法重新开机，这依然是个未解之谜。
But the inability to turn the phone back on, despite continuous charging, is still a mystery.
暗能量的真实本性仍然是个未解之谜，从理论上解释观测到的性状已经失败了。
Dark energy's true nature remains a mystery. Theoretical attempts to account for its observed properties have foundered.
蚕吐丝前，蛋白质尚未结晶，蚕是如何将蛋白质转换成蚕线一直是个未解之谜。
For some time it was a mystery how silkworms managed to convert these proteins into silk threads without the proteins crystallizing before the animal is ready to spin them.
古代的建筑者是如何建造这些庞然大物的，这一直是个未解之谜，但很明显它需要付出大量的脑力和体力。
How ancient builders managed to build these massive structures has never been fully answered but the effort clearly required brains and brawn4.
然而到目前为止，人们对独特性特征在大脑中如何获得加工依然是个未解之谜，有待进一步的深入研究。
However, until now, the question of how distinctive features processed in the brain is still unclear, it need to make further study.
古代的建筑者是如何建造这些庞然大物的，这一直是个未解之谜，但很明显它需要付出大量的脑力和体力。
How ancient builders managed to build these massive structures has never been fully answered but the effort clearly required brains and brawn.
古代的建筑者建是如何建造这些庞然大物的，这一直是个未解之谜，但很明显它要付出大量的脑力和体力。
How ancient builders managed to build these massive structures has never been fully answered but the effort clearly required brains and brawn.
人类最好的朋友的生殖系统似乎是现代科学的一个未解之谜。
It seems the reproductive system of man's best friend is one of the mysteries of modern science.
立式文档的发明文件仍然是一个未解之谜。
The invention of the vertical file remains an unsolved mystery.
这幅画究竟如何最终出现在谢泼森的画作之中仍然是一个未解之谜，尽管谢泼森被认为是一名谦虚的收藏家。
Quite how it ended up among paintings by Shepperson is still something of a mystery, although it has been suggested that Shepperson was a modest collector.
可转换债券折价的原因是金融学的一个未解之谜。
The underpricing of convertible bonds has been a puzzle in the finance literature.
可转换债券折价的原因是金融学的一个未解之谜。
The underpricing of convertible bonds has been a puzzle in the finance literature.
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