Degree sum conditions of ID-factor-critical graphs are studied. A lower bound for the degree sum of any two nonadjacent vertices such that G is ID-factor-critical is obtained, and the bound is sharp.
本文研究ID-因子临界图的度和条件，得到使得图G是ID-因子临界图的任意两个不相邻的顶点的度和的下界，同时说明这些结果是最好可能的。
To sum up, college study is definitely necessary if conditions allowed.
综上所述，如果条件允许，大学学习是绝对有必要的。
To sum up, we should consider these factors in an integrated manner, through a series of calculations in order to accurately know the actual flow of the pump meets required conditions.
综上所述，要综合地考虑以上各种因素，通过一系列的计算才能精确地知道泵的实际流量是否符合工况要求。
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