What kind of business problems need to be solved?
需要解决哪些类型的业务问题？
All the problems need to be solved by network flow assignment.
该问题需要通过网络配流的方法来解决。
And believe me, the real world is filled with problems that need to be solved.
相信我，现实世界中充斥着需要解决的问题。
However, there were some problems which need to be solved.
但在多媒体教学中仍存在许多问题有待解决。
Besides, some problems still need to be solved.
但也存在一些亟待解决的问题。
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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