根据该公司副总经理Fiona Qian 的说法，这种做法成本高说明一些炼油厂仍然在往垃圾掩埋场排放有毒废物。
According to Fiona Qian, the firm's deputy manager, the high cost of doing this means some refineries are still dumping toxic waste in landfills.
根据该公司副总经理Fiona Qian 的说法，这种做法成本高说明一些炼油厂仍然在往垃圾掩埋场排放有毒废物。
According to Fiona Qian, the firm's deputy manager, the high cost of doing this means some refineries are still dumping toxic waste in landfills.
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