我们每周只有三十六小时收统一关税
flattariff是指对通关时某一服务采取统一的收费标准
见下面的英语解释
flattariff
Aflatfee,alsoreferredtoasaflatrateoralinearrate,referstoapricingstructurethatchargesasinglefixedfeeforaservice,regardlessofusage.Rarely,itmayrefertoaratethatdoesnotvarywithusageortimeofuse.Anothertermusedis"flate",ahybridof"flat"and"rate".