rotation axis

Now, if you compute the curl of this guy, you will get zero, zero, two, two k.And so k is the axis of rotation, two is twice the angular velocity.

现在，如果你去计算它的旋度的话，得到，也就是2k，k是旋转轴，2是角速度的两倍。

the daily rotation of the earth on its axis

地球每天的自转

Axis of instantaneous rotation: the true astronomical axis; the rotation axis.

瞬时旋转轴: 真正的天文学轴; 旋转轴.

...the daily rotation of the earth upon its axis.

地球每天绕地轴自转

Firstly, the Gauss map of points on the cylinder and a random sampling method are used to compute the rotation axis equation of the simple articulator.

首先通过构造圆柱面上点的高斯图和任意采样的方法，计算出简单牙合架转动轴线方程。

Parallel axis theorem and K ? nig theorem are deduced from the two laws of rotation.

摘要由两个转动定律导出了平行轴定理和柯尼希定理.