大量的数论问题都跟素数相关，它们中的大部分仍然悬而未解，有些甚至过了几个世纪依然无法攻克。
Numerous arithmetical problems concern prime numbers and most of them still remain unresolved, sometimes even after several centuries.
有关我们经历了什么，以及我们如何经历的疑问，引导我们进入下一个大脑未解之谜- - -古老的意识问题。
The question of what we've experienced and how we experienced it is leading into our next unsolved brain mystery — the age-old question of consciousness.
批评家争论说美国强推这一议题是因为还有其他未解的难题，包括美国棉花补贴水平的问题。
Critics argued that the United States had forced the issue because other problems remained unresolved, including the level of United States cotton subsidies.
几天后，凯尔先生口风一转，宣布在跛鸭会期结束之前没有时间对条约作充分考虑，并提到有“复杂而未解的问题”，具体是什么问题却又没有明说。
A few days later Mr Kyl changed tack and announced there would not be time to consider the treaty properly before the end of the lame-duck session, citing unnamed but "complex and unresolved issues".
本次会议的目的就是要讨论对悬而未解的问题的可能解决办法。
The purpose of this meeting is to discuss possible solutions for the pending issues.
尽管如此，的确有个悬而未解的问题。
不真正不作为犯的问题，历来就有“未解之题”和“最难且未令人满意地解决的难题”之称。
We have not always had the claiming of "question not solved" and "most difficult and difficult problem not solved satisfactorily" as the question that is made.
川中地区磨溪—龙女寺构造带下三叠统嘉陵江组天然气的成藏机理一直是一个悬而未解的问题。
The accumulation mechanism of natural gas is still an unsolved problem in the Lower Triassic Jialingjiang Formation of Moxi-Longnüsi area in the middle of Sichuan Basin.
这是一个传统的问题，但一直又是一个悬而未解的难题。
This is a traditional problem, yet it really can not be solved from beginning to end.
数学是一门解决问题的学科，正是数学中那些未解之谜让数学焕发了勃勃生机。
Mathematics is about solving problems, and it's the great unsolved problems that make maths really alive.
关于海子的研究仍然存在着不少未解之迷。其中最大的迷，即是“四姐妹”身份确定问题。实际上，答案已在《日记》一诗中。
The greatest riddle in Hai-zi's Poems is"Four sisters". The answer lies in his love poem "Di-ary".
关于海子的研究仍然存在着不少未解之迷。其中最大的迷，即是“四姐妹”身份确定问题。实际上，答案已在《日记》一诗中。
The greatest riddle in Hai-zi's Poems is"Four sisters". The answer lies in his love poem "Di-ary".
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