What are the big problems that have to be solved?
必须解决的大问题是什么呢？
What are the problems that must be solved to achieve this objective?
为了这个目的，有些什么问题应该解决的呢？
The problems you are facing seem to be complex and not easily solved.
你的问题似乎正面临着复杂和不容易解决。
While many old problems still remain to be solved, many new ones are emerging.
很多旧问题需要继续解决，新问题更是层出不穷。
There are too many problems to be solved.
有很多问题有待解决。
Yet , there are two problems to be solved .
然而，有将解决的二个问题。
There are many Problems difficult to be solved in the information organizations in our country.
认为我国的情报机构，存在着许多难以解决的问题。
In the end, some problems are brought forward to be solved.
最后，提出了一些待研究解决的问题。
Finally, the problems which need to be solved in the future development are also discussed.
最后讨论了今后研究所需要解决的问题。
Finally, the problems which need to be solved in the future development are also discussed.
最后讨论了今后研究所需要解决的问题。
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