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rotation

noun
 
🔊/rəʊˈteɪʃn/
🔊/rəʊˈteɪʃn/
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  1.  
    [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
    Topics Spacec1
  2.  
    [countable] one complete movement in a circle around a fixed point（旋转的）一周，一圈
    • This switch controls the number of rotations per minute.这个开关控制着每分钟的转数。🔊🔊
  3.  
    [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。🔊🔊
    Topics Farmingc1
    4. Word Originmid 16th cent.: from Latin rotatio(n-), from the verb rotare, from rota ‘wheel’.