But the problem for concessionaires is much larger cost bases to service .
但对于特许经营者而言,问题在于服务的成本基础明显扩大。
Financial decision-making models of government and concessionaires for bot projects .
建构bot计画政府与特许公司财务决策模型。
Toll-road and energy concessionaires who signed deals when rates were much higher benefited hugely as they fell , she points out , leaving some low-risk projects earning real returns approaching 20 % .