rotary /ˈrəutəri/ adj. 旋转的：rotary movement 旋转运动；worked by rotary motion (指机器)由旋转而工作的；a rotary printing machine 轮转印刷机
rotate /rəuˈteit/ vt. & vi.(使)旋转，(使)转动：The doctor asked the patient to rotate his eyes. 医生叫病人转动眼球。Wheels, tops and the earth rotate. 轮子，陀螺和地球均旋转。
rotation n. 旋转，转动；循环，轮流
