1 (a) [U] rotating or being rotated 旋转; 转动
*the rotation of the Earth 地球的自转.
(b) [C] one complete movement of this type （旋转的）一圈; （一）转
*five rotations per hour 每小时旋转五圈.
2 [C, U] regular organized sequence of things or events 轮流; 轮换
*the rotation of crops/crop rotation, ie varying the crops grown each year on the same land to avoid exhausting the soil 作物的轮作[轮种].
3 (idm 习语) in rotation in turn; in regular succession 轮流地; 轮番地; 循环地
*The chairmanship of the committee changes in rotation. 委员会主席一职是轮流担任的.
when something turns with a circular movement around a central pointrotation of the rotation of the Earth on its axisrotation about/around the planet's rotation around the sun[C]
one complete circular turn around a central point
= revolution The blades spin at 100 rotations per minute.[U]
the practice of regularly changing the thing that is being used or done, or the person who does a particular job job rotationin rotation Three plays will be performed in rotation during the drama festival.[C]AmE
a period of time spent doing a particular job, when you will soon change to a different job for the same employer a young doctor on a rotation in the children's ward[C]AmE
the people who each take a turn to do a particular job in a regular order The rotation included two rookies, Hernandez and Saunders.>rotationaladj
1. The land has been regenerated by rotation of crops. 这块土地已通过轮作法恢复了地力。
2. The land has been regenerated by rotation of crops. 这块土地已通过轮作法恢复了地力。
3. Periodic rotation of tyres will result in longer tyre life. 轮胎定期换位能延长其使用寿命。