In this paper, the optimum type of intervening opportunity model has been advanced, which is in agreement with the results in our practice.
这里提出的优化型介入机会模型，已在实践中获得满意的结果。
The intervening opportunity model has special value and occupies important position in the study of multiple transport network, but it must be improved.
在综合运输研究中，介入机会模型有着特殊的价值和地位，但必须加以改造。
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