rotary
adjective uk/ˈrəʊ.tər.i/ us/ˈroʊ.t̬ɚ.i/
（机器）有旋转部件的;旋转式的
(of a machine) having a part that moves around in a circle
a rotary engine 旋转式发动机
rotary
noun [ C ] US uk/ˈrəʊ.tər.i/ us/ˈroʊ.t̬ɚ.i/
（同 traffic circle）
a traffic circle