这些轮子绕轴转动，以方便操控。
它们通过质量绕轴旋转机械存储能量。
They store the energy mechanically by rotating mass around an axis.
是你让地球不停地绕轴自转了吗？
其含绕轴转动的收集器和风向标。
It comprises collector and wind vane they can rotate around the rotating axis.
地球一面绕太阳运行，一面绕轴自转。
As the earth travels round the sun, it turns round its own axis.
要知道地球绕轴转一回要用二十四个钟头。
You see the earth takes twenty-four hours to turn round on its axis.
地球是绕轴旋转的吗？
地球绕轴自转，引起昼夜的变化。名词化结构。
The rotation of the earth on its own axis causes the change from day to night.
地球绕轴自转。
旋转，绕转：围绕一个点的轨道运动，尤指区别于绕轴旋转的。
Orbital motion about a point, especially as distinguished from axial rotation.
正面部件为拖把提供了一种相对于待清洁表面 绕轴转动的能力。
The elevational element provides the mop with the ability to pivot relative the surface to be cleaned.
然后我将使其绕轴旋转-,像这样旋转-,为角速度,这个距离记为。
Now I'm going to rotate this about this axis-- - it's going around like this-- with an angular velocity omega R and this is at a distance, R.
滚动，使转动：使…以绕轴旋转或不断滚动的方式沿一水平面向前运动。
To cause to move forward along a surface by revolving on an axis or by repeatedly turning over.
旋转的，转动的：属于、有关、引起或以转动为特征的，尤指绕轴转动。
Of, relating to, causing, or characterized by rotation, especially axial rotation.
克服现有技术中链条只能在垂直面内绕轴卷曲，不能在水平面内折弯的缺陷；
The disadvantages in the prior art that a chain can be curled by winding the shaft only in the vertical surface and can not be bent on the horizontal plane is overcome;
然而，如果在诞生之时宇宙就绕轴朝着一个方向运动，那么星系就应该保留了这样的旋转。
However, if at birth the universe revolved around its axis in one direction, then the galaxies would have retained the rotation.
所有的坐垫要能够做到相对于用力方向的绕轴旋转以及该旋转点要和承载面尽可能地靠拢。
All loading pads shall be capable of pivoting in relation to the direction of the applied force and the pivot point shall be as close as practically possible to the load surface.
卷轴：一种如卷筒、卷轴或框，绕轴旋转装置，用于卷起和贮存绳索、磁带、胶片或其它带弹性的物质。
A device, such as a cylinder, spool, or frame, that turns on an axis and is used for winding and storing rope, tape, film, or other flexible materials.
近地半球总是面对地球，远地半球总是远离地球，因为月球在绕地球旋转的同时，它也在以同样的速率绕自己的轴自转。
The near side is always facing Earth and the far side is always facing away, because the moon revolves around the Earth at the same rate that it rotates on its own axis.
地球绕一个贯穿南极点和北极点的假想轴旋转，这个假想轴称为地轴。同时也绕太阳公转。
The Earth spins on an imaginary line called an axis that runs from the north pole to the south pole, while also orbiting the sun.
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。
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.
但它完全不同，转动惯量，如果将其绕这轴旋转。
But it's completely different, the moment of inertia, if you rotated it about this axis.
然后去测量,绕该轴旋转物体的困难程度。
Then you would try to measure how hard it is to spin your object around that axis.
我迫使这个物体，绕这轴旋转。
And I'm going to force this object to rotate about that axis.
它是绕垂直轴旋转的。
关于绕z轴的转动惯量,到z轴的距离是多少？
OK, so moment of inertia about the z axis so, what's the distance to the z axis?
postRotate(floatangle,floatax, floatay, floataz)：按给定角度绕穿过（0, 0, 0）和（ax, ay, az）的轴旋转对象。
Transform.postRotate(float angle, float ax, float ay, float az): Rotates the object with the given angle around the axis that goes through (0, 0, 0) and (ax, ay, az).
postRotate(floatangle,floatax, floatay, floataz)：按给定角度绕穿过（0, 0, 0）和（ax, ay, az）的轴旋转对象。
Transform.postRotate(float angle, float ax, float ay, float az): Rotates the object with the given angle around the axis that goes through (0, 0, 0) and (ax, ay, az).
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