rotation

英 [rə(ʊ)'teɪʃ(ə)n] 美[ro'teʃən]

• n. 旋转；循环，轮流

1. the act of rotating as if on an axis;

"the rotation of the dancer kept time with the music"

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

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"

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"