1N-COUNT 双层公共汽车 A double-decker or a double-decker bus is a bus that has two levels, so that passengers can sit upstairs or downstairs. 双层公共汽车 [mainly British]
2ADJ [ADJ n]双层结构的;两层的Double-decker items or structures have two layers or levels instead of one. 双层结构的;两层的