How fast and accurate to solve the problem has now become a difficult point in the problem of TSP algorithm.
如何快速准确的解决TSP问题成为了现在TSP算法研究中的一个难点。
The calculation of chemical thermodynamics function is both the key point and a difficult problem in the study of physical chemistry.
化学热力学函数的计算是学习物理化学的重点和难点。
In environmental monitoring system, the data transmission among each scattered monitoring point is always a difficult problem in establishing the monitoring system.
环境监控系统中各分散监控点的数据传输问题，一直是建立环境监控系统的难点。
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