滚动 roll; trundle; rolling; volution; run; rolling motion◇滚动半径 rolling radius; 滚动传感器 roll sensor; 滚动导弹 rolling missile; 滚动导轨 rolling guide; 滚动法 rolling method; 滚动刮土机 tumble-bug; 滚动面 rolling surface; 滚动摩擦 friction of rolling; rolling friction; 滚动筛 drum screen; roller screen; 滚动载荷 rolling load; 滚动闸门 rolling caisson; 滚动轴 axis of rolling; 滚动轴承 rolling bearing; 滚动装置 tourelle; tumbler; 滚动阻力 resistance to rolling
定义 1.(确切而简要的说明) definition; delimiting 确切的定义 an exact definition; 给一个词下定义要比举例说明它的用法困难。 to give a definition of a word is more difficult than to give an illustration of its use.2.(给以确切而简要的说明) define 被定义为 ... be defined as ..