So, L is the length of her body spinning about some axis of rotation.

L 是她身体围绕某个旋转轴旋转的长度。

And when a round object spins, it bulges perpendicular to the axis of rotation.

当一个圆形的东西转动，会让垂直转轴的部分凸起。

Under normal rolling conditions, the forward motion of the suitcase is perpendicular to the wheels' axis of rotation.

在正常滚动的情况下，行李箱的前进运动与轮子的转动轴垂直。

Precession, basically is the change in the direction of earth’s axis of rotation.

进动，基本上是地球自转轴方向的变化。

Another is the distance between the force and the axis of rotation -- or the radius.

另一个因素是力之间的距离 运动轴或半径。

The farther away the mass is from the axis of rotation, the higher the object's moment of inertia.

质量离旋转轴越远， 物体的转动惯量值越高。

And so the Moon has played an important role in the stability of our axis of rotation, of our planet and therefore in our climate.

所以月球在稳定我们的旋转轴，稳定我们星球和气候方面扮演了重要的角色。

The woman's force had counted as inertia of rotation, and her axis of rotation had been the cradle and the family.

女人的力量算作转动的惯性，她的转动轴就是摇篮和家庭。

If you can find an aigen vector for that rotation, a vector that remains on its own span, what you have found is the axis of rotation.

如果你能找到一个旋转的aigen向量 一个在它自己张成的空间上的向量 你找到的就是旋转轴。

Divide that by the vertical distance from where the ladder hits the wall to our axis of rotation, and we get 36.8 Newtons: the force from the wall on the ladder.

将其除以从梯子撞击墙壁的位置到我们的旋转轴的垂直距离，我们得到 36. 8 牛顿：梯子上的墙壁的力。

And it's much easier to think about a three D rotation in terms of some axis of rotation and an angle by which it's rotating, rather than thinking about the full three by three matrix associated with that transformation.

用旋转轴和旋转角度来考虑三维旋转要容易得多 而不是考虑与这个变换相关的完整的3×3矩阵。