transportation policy短语¹³¹⁶²⁰⁺³ 基本例句 运输政策 Traffic congestion and pollution in many urban areas are the most serious problems facing transportation policy makers, whose effective management polices may be bus priority and congestion pricing. 交通拥挤和污染是目前世界多数大中城市普遍面临的问题,公交优先和拥挤定价是针对该问题的有效管理措施。 cnki