connected with the action of moving in a circle around a central fixed point 旋转;转动 rotational motion/forces 旋转运动/力
regularly changing the thing that is being used in a particular situation, or the person who does a particular job 轮换;交替;换班 The event is held on a rotational basis in each of the participating countries. 该活动在每个参与国轮流举行。