rotation

旋转；轮转

旋转一周

rotation

旋转

rotation

1. the act of rotating as if on an axis; "the rotation of the dancer kept time with the music"

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2. (mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin

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3. a single complete turn (axial or orbital); "the plane made three rotations before it crashed"; "the revolution of the earth about the sun takes one year"

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4. a planned recurrent sequence (of crops or personnel etc.); "crop rotation makes a balanced demand on the fertility of the soil"; "the manager had only four starting pitchers in his rotation"

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