Actually, we are rotating at unit angular speed.
实际上,是以单位角度旋转。
Is the state of the axial rotation of a rigid body at constant angular speed stable?
刚体的匀角速定轴转动状态是平衡态吗?
The curl actually measures twice the angular speed of a rotation part of a motion at any given point.
旋度实际上衡量的是,在任意给定点,运动旋转角速度的两倍。
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