The bus we rode on was a double-decker.我们乘坐的是双层巴士。The double-decker bus stopped to pick up some more passengers.那辆双层公共汽车停下来又搭载了一些乘客。The double-decker bus is the very emblem of London.双层巴士是伦敦的象征。We took a tour of London on a double-decker bus.我们乘坐双层巴士游览伦敦。