concessionn.让步;特许权;租界;妥协
concessionary and contracting company特许承包公司
concessionary rates/fares/travel优惠费率/票价/旅行
concessionary and contracting companies[经] 特许承包公司
Concessionary grant of Government lease以优惠条件批出政府租契
Concessionary Scheme for Disadvantaged Groups弱势社群优惠计划