suitcases on wheels 是什么意思?

英文（wheels)是什么意思? 幼儿英语wheels on the WHEELS ON THE BUS怎么样 to be three wheels是什么意思 英语翻译wind his wheels on the street. 英语翻译The Wheels on the Bus The wheels on the bus go round and And the party on wheels moves on什么意思啊? The car made the United States a nation on wheels. 求the wheels on the bus 的伴奏? "america is a country on wheels"的含义是? （翻译）wheels within wheels The car made the United States a nation on wheels.（翻译）