variable operating cost造句

例句与造句

1. The epd proposed to revise the existing charges for the disposal of chemical waste at the chemical waste treatment centre to meet the objective of achieving full recovery of the variable operating cost for providing the service
   环保署建议调整化学废物处理中心处置化学废物的收费，以达致全数收回提供有关服务的变动经营成本。
2. It's difficult to find variable operating cost in a sentence. 用variable operating cost造句挺难的