名词

1. 旋转;转动
Rotation is circular movement. A rotation is the movement of something through one complete circle.

2. 轮流;轮班
The rotation of a group of things or people is the fact of them taking turns to do a particular job or serve a particular purpose. If people do something in rotation, they take turns to do it.

1. the act of rotating as if on an axis

e.g. the rotation of the dancer kept time with the music

Synonym: rotary motion

2. a planned recurrent sequence (of crops or personnel etc.)

e.g. crop rotation makes a balanced demand on the fertility of the soil
the manager had only four starting pitchers in his rotation

3. a single complete turn (axial or orbital)

e.g. the plane made three rotations before it crashed
the revolution of the earth about the sun takes one year

Synonym: revolutiongyration

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