- [uncountable]
the action of an object moving in a circle around a central fixed point 旋转；转动 the daily rotation of the earth on its axis 地球每天的自转 the earth's rotation around the sun 地球环绕太阳的旋转
- [countable]
one complete movement in a circle around a fixed point （旋转的）一周，一圈 - [uncountable, countable]
the act of regularly changing the thing that is being used in a particular situation, or of changing the person who does a particular job 轮换；交替；换班 crop rotation/the rotation of crops (= changing the crop that is grown on an area of land in order to protect the soil) 庄稼的轮作 job rotation (= the practice of regularly changing the job that a particular person does so that they become experienced in different areas) 工作的轮换 - in rotation
Wheat, maize and sugar beet are planted in rotation. 小麦、玉米和甜菜是轮流种植的。 The committee is chaired by all the members in rotation. 委员会由所有成员轮流担任主席。
Word Originmid 16th cent.: from Latin rotatio(n-), from the verb rotare, from rota ‘wheel’.