Impeller rotation angular velocity and flow into a linear relationship, the measured angular velocity of rotation can be measured flow value.
叶轮的旋转角速度与流量成线形关系，测得旋转角速度就可测得流量值。
Concretely, this curl gives you the angular velocity of the rotation, well, with a factor two but that doesn't matter, and the axis of rotation, the direction of the axis of rotation.
它给出了这个旋转的角速率，有一个因子2，但没关系，给出了旋转轴，和旋转轴的方向。
Because of tidal friction and aggrandizement of the earth's volume, the earth's rotation angular velocity slows down.
随着潮汐摩擦力和地球体积的增大，地球自转角速度变慢。
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