The structure of grinding wheels can realize high point grinding, and the good grinding equiprobability lies on a proper spinning speed and the random variation of the spinning axis.
砂轮本身的结构特点可保证高点磨削的实现，而磨削等概率性则依赖于：生坯球合适的自旋速度及自旋轴方向的随机变化。
Nuclear bombs are humankind's most powerful weapon, but their destructive impact would unlikely alter the spinning of the Earth on its axis.
核弹是人类最强大的武器，但是它们的破坏性影响还不大可能改变地球沿着其轴线的自转。
Consider a ball that is spinning about an axis perpendicular to the flow of air across it (see left).
观察一个旋转轴与空气流动方向垂直的足球(见上图)。
So you can see, if it's spinning on its own axis in this direction we'd call it spin up, where as this way it would be what we call spin down.
你们可以看到，如果它绕自己的轴朝这个方向转，我们就说它是自旋朝上，这个方向我们叫它自旋朝下。
He was chosen from the group for his lack of dizziness after spinning around on the three-axis astronaut training machine downstairs.
想要当选这个小宇航员可不容易，所有的同学们都在楼下的三轴模拟旋转训练器上进行测试，眩晕程度最低的才能当选。
Theoretically speaking, it is a rather-clearly discussed subject to standardize the quadratic equation into the normal forms by spinning the coordinate axis so as to approach the shapes of its curves.
从理论上讲，通过坐标轴旋转将二次方程化简为规范形式，从而讨论其曲线的形状，这已是讨论得相当明了的课题。
Do you keep the Earth spinning on its axis?
是你让地球不停地绕轴自转了吗？
Gyroscope: a mechanical gyroscope consists of a rapidly spinning wheel set in a framework that permits it to tilt freely in any direction or to rotate about any axis.
陀螺仪：主要组成部分是安装在框架内能绕任意轴高速旋转的转子。
It is significant to improve the performance of spindle and spinning by studying the spindle axis orbit of vibration.
对锭子轴心振动轨迹进行研究，对提高锭子的性能及纺纱质量有重大的意义。
Wouldn't we feel the earth moving if it were spinning on its axis, or if it were travelling through space in an orbit around the sun?
如果地球是在绕地轴自转，或是绕着太阳公转，我们为何一点也感觉不到呢？
Our world, spinning slightly off its axis, is full of doubt, full of fear.
我们的世界稍微有点离轴，其中充满了猜疑和恐惧。
The seasons occur because the spinning Earth is tilted on its axis.
四季是因为地球沿着轴线自转而形成的。
Hold the spinning Bicycle Wheel Gyroscope with its axis horizontal.
手上拿著车轮回旋仪并保持它的转轴水平。
I'm talking about the entire sun spinning on its axis, like a globe when you give it a push with your hand.
我说的是太阳以自身为轴转动，就像地球仪你用手推它一下就会自己转动。
I'm talking about the entire sun spinning on its axis, like a globe when you give it a push with your hand.
我说的是太阳以自身为轴转动，就像地球仪你用手推它一下就会自己转动。
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