Precession, basically is the change in the direction of earth's axis of rotation.
岁差，基本上是地球自转轴方向的改变。
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。
If a torque is applied to the disk in such a fashion that the axis of the torque is the same as that of rotation of the disk, the direction of the former will be parallel to AB.
如果力矩是这样地作用于一圆盘上，即力矩的轴与圆盘的旋转轴方向一致，则力矩的方向与ab线平行。
Moment of inertia: turning around its axis of symmetry, object has the character keeping speed and the direction of the axis of rotation not changing.
转动惯性：物体在绕着自己的对称轴转动时，具有保持转速和转动轴方向不变的性质。
Sometimes it all gets pretty messy, and some of the energy can be channeled into focused jets that shoot out in both direction along the axis of the black hole's rotation.
有时候，这一切会很混乱，一些能源可以转化为重点的飞机拍摄了这两个方向轴的黑洞旋转。
In turning the work a cutter moves in the direction parallel to the axis of rotation of the work or at an Angle to this axis, cutting off the metal from the surface of the work.
在转弯时的事变方向运动的刀平行轴的旋转的事变或在一个角度来这个轴，堵截金属的外貌的事变。
Thrusters that accelerate the rotating spacecraft along the direction of the rotation axis burned steadily for about 28 minutes.
沿自转轴方向加速飞船的推进器稳定燃烧了约28分钟。
In the perpendicular direction to the rotation axis of the petal, the repeat position error is most sensitive to the position error of the locking force.
在对接面内与旁瓣转轴方向相垂直的方向上，重复定位误差对锁紧力位置误差最为敏感。
It is of built-in type, single seal face, single spring and unbalanced type with hook spring transmission, and the direction of rotation of spring depending on that of axis.
内装式、单端面、单弹簧、非平衡型，带钩弹簧传动，弹簧旋向与轴旋向有关。
It is of built-in type, single seal face, single spring and unbalanced type with hook spring transmission, and the direction of rotation of spring depending on that of axis.
内装式、单端面、单弹簧、非平衡型，带钩弹簧传动，弹簧旋向与轴旋向有关。
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