问题的表述往往会使文章的亮点突出，恰当的运用问题表述语句更能吸引审稿人。
1. There are several ways to get around this problem.
2. As difficult as it seems to be, xx is by no means new.
3. The problem is to recognize xx from a design representation.
4. A xx problem can trace its roots to xx.
5. xx [1987] used a heuristic Approach to simplify the complexity of the problem.
6. Several problems are associated with them.
7. Although some progress has been made in this area, at least two major obstacles must be overcome before a fully automated system can be realized.
8. Most problems in practice are complicated
9. More problem surface here.
10. Hamper effort toward a xx system
11. In order to overcome the limitations due to incomplete and imprecise xx knowledge, a xx program has been developed, which bases its knowledge upon the statistical analysis of a sample population of xx
12. The above difficulties are real challenges faced by researchers attempting to develop
13. This type of mapping raises no controversy to the issue of membership function determination.
14. However, attempts to quantify the xx have met both theoretical and empirical problems.
15. It has become apparent that in order to apply this new methodological framework to real world problems and data, we have to pay attention to the problems of xx and xx.
