gray decision-making

• 灰色决策

gray decision-making的用法和样例：

例句

1. Elements which influence the urban traffic air, we design a index system and construct the grey decision model to assess the Quality of the air.
   分析城市交通环境空气影响因素，设计一套评价指标体系，并建立了环境大气质量评价的灰色决策模型。