1. a vehicle carrying many passengers; used for public transport;

   "he always rode the bus to work"
   

1.双层公共汽车
Adouble-decker or adouble-decker bus is a bus that has two levels, so that passengers can sit upstairs or downstairs.

2.双层结构的;两层的
double-decker items or structures have two layers or levels instead of one.

e.g. ...adouble-decker sandwich.
双层三明治
e.g. ...adouble-decker pleasure boat.
双层游艇

1. 双层巴士：我看见了那早已熟悉的双层巴士(DOUBLE DECKER) 和老式的出租车,却有别样的新鲜体会. 后来傍晚的时候,我坐在这广场旁的一家汉堡快餐店里等朋友,看着窗外熙熙攘攘的各种肤色的人群 (不知道为什么那一带的黄种人特别的多,除了华裔之外还有很多日本人),

2. 双层汽车：trolley 电车 |double-decker 双层汽车 | long-distance bus 长途汽车

3. (三文治：44 For Your Heart Only 为你钟情 [1985] | 45 Double Decker 三文治 [1984] | 46 Merry Christmas 圣诞快乐 [1984]

4. 两层公共汽车：double decker box bag 双格提包 | double decker 两层公共汽车 | double decomposition grease 复合解润滑脂