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。
2
And if the axis of rotation doesn't coincide with the line through the two hot spots, if the neutron star rotates, you're going to see X-ray pulsations.
不合这两点之间的线，相一致，如果中子星旋转，你会看到x射线脉动，当热点在这里。
3
Parallel axis theorem and Knig theorem are deduced from the two laws of rotation.