two-tier test两阶段审查法;两层结构标准
two-tier market[贸易] 双层市场
two-tier tariff双重关税
two-tier planning双层规划
Two-tier ball两层球
two-tier terminals双列端子排
Two-tier Storage两级存储
two-tier provision二重赁金条项
two-tier loan双重等级贷款
ADJ（形容词） involving or comprising two levels of structure, policy, etc 双重结构、政策的