two-tier
01
两层的, 二元的
(of systems, structures, or arrangements) divided into two distinct parts or groups
例子
The company has a two-tier pricing system for its products.
该公司对其产品采用两级定价系统。
Their two-tier membership gives access to different benefits at each level.
他们的两级会员资格可以在每个级别享受不同的福利。
