这是一个老问题。
The big unsolved problem is scanner technology.
还没有解决的最大问题则是扫描技术。
However, the most profound unsolved problem in biology is the origin of life itself.
然而，生物学中尚未解决的最深奥的问题是生命起源本身。
How to design a reasonable evaluation system of customer value is still an unsolved problem.
如何设计一套实用的客户价值评价指标体系仍是尚未解决的问题。
The problem of dynamics and control of the system is considered unsolved so far.
一个尚未解决的问题是该系统的动力学与控制的研究。
The problem is still unsolved at a fundamental level.
问题仍然没有解决的基本要求。
This problem may lead to more serious ones if (it is) left unsolved.
如果这个问题一直得不到解决，就会变得很严重。
In that case, the world's climate problem would remain unsolved.
如果真是这样，那么世界气候问题将持续得不到解决。
There is only one problem left unsolved.
只剩下一个问题。
The problem remained unsolved until last year.
问题到去年才解决。
The problem still remains unsolved.
这个问题仍然一直没有解决。
Hume's problem was still unsolved. Is it because of the premise of the problem?
休谟问题一直悬而来决，是否是由于问题前提的原因？
Hume's problem was still unsolved. Is it because of the premise of the problem?
休谟问题一直悬而来决，是否是由于问题前提的原因？
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