single-decker bus单层公共汽车
single-decker buses单层公交车
private single-decker bus私家单层巴士
a single-decker bus一辆单层汽车
single-span-multiple decker frame单跨多层规则刚架
regular single-span multiple decker frame单跨多层规则刚架
N（名词） a bus with only one passenger deck 单层公共汽车 [英国英语][非正式]