The covenants are designed to maintain a certain aspect of the area in question.
该公约的目的是保持一定的方面，该地区的问题。
It carries out a series of models, procedures and strategies of teaching in order to solve problems in a certain aspect during the process of teaching.
它是为了解决教学过程中存在的某一方面的问题而提出的一整套方法、教学程序、教学策略等。
In this paper we discuss the distribution of vertices of degree 5 on the longest path and cycle and thus give a characterization of contraction critical 5-connected graph in a certain aspect.
讨论收缩临界5 -连通图最长路和最长圈上5度点的分布情况，刻画收缩临界5 -连通图的结构。
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