walker:1.One that walks, especially a contestant in a footrace.步行者2.A frame device used to support someone, such as an infant learning to walk or a convalescent learning to walk again.支持物3.A shoe specially designed for walking comfortably. Often used in the plural.轻便鞋4.A city of west-central Michigan, a suburb of Grand Rapids. Population, 17,279.沃克：密歇根中西部城市，大瀑布城的郊区城之一。人口17,279newcastle:A town of southern Ontario, Canada, on Lake Ontario east of Toronto. It was established in a dairy and farm region. Population, 32,229.纽卡斯尔：加拿大安大略南部的一个小镇，位于多伦多东边的安大略湖畔。它建于一个牛奶和农场区上。人口32,229