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- The attributes reduction of Rough Set is NP problem, and it makes Rough Set hard to use broadly in reality. 摘要粗糙集的属性约简属于NP问题，这就使得粗糙集很难在现实中得到广泛的应用。
- The Capacitated Plant Location Problem (CPLP) is a NP problem and hard to get an optimal and satisfactory solution. 摘要容量受限的工厂选址问题属于NP难题，较难得到最优解和满意解。
- Job-Shop Scheduling（JSS） is a NP problem，but the research for Job-Shop Scheduling with multi-craft is more practical. 摘要 车间调度问题是一个NP难题，而多工艺路线的车间调度问题更具有实际的研究意义。
- UTP is an NP problem, It is required to satisfy the requirements of the five elements of the soft and hard constraints in a certain time and space. 摘要UTP问题是一个NP问题，要求在一定时间空间内满足五要素的软、硬约束条件。
- Job-shop Scheduling Problem is a typical NP problems, which is one of the hardest combinatorial optimization problem. 作业车间调度问题是一个典型的NP难问题，是最困难的组合优化问题之一。
- The service oriented grid workflow, GSF, has been a research focus in grid technology.As an NP problem, grid service scheduling is difficult to solve by means of classic algorithms. 摘要网格服务的提出为网格工作流的研究提供了新的契机与挑战，由网格服务组成的工作流(GSF)的调度问题是一个典型的NP问题。
- VRP is a typical NP hard problem, and the genetic algorithm (GA) is an adaptive heuristic search method which is considered as the way to solve the NP problems. VRP是典型的NP难问题，遗传算法是一种自适应随机搜索方法，被认为是解决NP难题的途径。
- Location routing are tough NP problems, and the quadtree principle was introduced to divide the collection areas, turning them into minor TSP problems. 选址路径问题为NP困难问题，采用了四叉树原理划分满足车辆容量限制的收集区，将问题化为小型的TSP问题。
- They are the ones with the property found by Cook, Karp and Levin: If an efficient algorithm for any one of them were found, it could be adapted to solve all the other NP problems as well. 这类问题具有库克、卡普与李文所发现的性质：如果可以找到其中一个问题的有效演算法，就能修改这个演算法，解决所有其他的NP问题。
- Kindly send us two samples of each class quote for. 报价时，请对每一个等级的各寄两个样品。
- The average age of the boys in this class is fifteen. 本班男生的平均年龄是十五岁。
- Henry is nowhere when it comes to the race for class president. 亨利在竞选级长中被远远抛在后面。
- She got cold feet when asked to recite in class. 当她被叫起来在班上背诵时害怕了。
- She was kept in for an hour for talking in class. 她因上课说话被罚留校一小时。
- The students in our class number thirty. 我班总共有三十名学生。
- I was out and away the handsomest man in the class. 我是当时全班最帅的男子汉。
- Soon I dropped behind the rest of the class. 不久我就落在班上其他同志后面了。
- Pele was in a class of his own as a footballer. 贝利是举世无双的足球健将。
- He always travels first class expense is no object. 他出门总是用头等票－－费用不成问题。
- She stood out as the best in the class. 她是班级里最出色的学生。
