R 开头单词
running-water community [生物学]流水群集
running-track n.跑道
running-shoes n.跑鞋
running-out period [土木建筑工程]运行结束期
running-out n.惯性运动
running-on 套罗口
running-mate 竞选伙伴
running-light 空载运行
running-in period [机][车辆] 磨合期 跑合期 走合期
running-in n. [机][车辆] 磨合（等于breaking-in，wearing-in）；试运转；慎行；配研
running-idle 空转
running-hand calligraghy style [艺术学]行草书风
running-down of business [经济学]缩减业务
running-down clause [交通运输工程]船舶碰撞条款
running-board n.(汽车等车辆的)脚踏板
running water n. 自来水；活水