一个物体若要在某一点处处于转动平衡，在这一点处的总力矩必须为零。
For an object to be in rotational equilibrium about a certain point, the total torque about this point must be zero.
由于较低部位的电缆比较高部位的电缆移动慢，上升的电梯箱将落后于转动锚点，这样就会引起一个拖拽并可能进一步破坏整个装置的稳定。
Since the lower regions of the cable are moving slower than the higher ones, a rising car will lag behind the orbiting anchor, causing a drag on the cable that could destabilize the entire assembly.
一些学者认为，鸟类可能会在自己的视野边缘看到一个点，并根据它们飞行的方向作相应转动。
Some researchers think birds might see a dot at the edge of their vision, swiveling according to the direction they're facing.
旋转对称(或称放射对称)是指某一物体绕着某一点在某一方向上做转动。
Rotational symmetry (or radial symmetry) is when an object is rotated in a certain direction around a point.
她可能会转动地球仪，用手指随意一点，点到哪儿，就决定去哪儿。
She might spin a globe, place her finger on a random spot, and decide to move there.
你被缩小到只有硬币厚度那么点高（不是压扁，是按比例缩小），然后被扔到一个空的玻璃搅拌器中，搅拌刀片一分钟后就开始转动。
You are shrunk to the height of a nickel andyour mass is proportionally reduced so as to maintain your originaldensity. You are then thrown into an empty glass blender.
镜子在小平台上，可以绕这个点转动，但是不能自己降低。
But this mirror is on a little platform and can pivot at this point but cannot lower itself.
我现在只需要知道，点p的转动惯量是多少。
All I have to know now is what is the moment of inertia about P.
我们要去计算关于这个点的转动惯量。
Well, we will try to compute now the moment of inertia about this point.
一个飞盘是有边缘，所以可以，让它绕着边缘上某点旋转，就像这样，绕边缘点转动它。
A Frisbee has this rim so you can actually try to make it rotate around the point on the circumference by holding it near the rim and spinning it there.
然而随着时间的流逝，新的特色零售店又会找到切入点，创立相应的公司以比其它大型零售店更好地满足那些客户的需求——而此时飞轮就又转动起来。
However, in time, new specialty retailers discover niches and create targeted organizations to meet those customer needs better than the large retailers — and the wheel turns again.
角频率是，点p的转动惯量。
And angular frequency is the square root inertia about point p.
也就是bMg除以,点P的转动惯量。
So it is bMg divided by the moment of inertia about that point P.
保持随动系统以最低电压转动，在000 ~ 360度范围内找出不灵点。
Keep follow system with minimum voltage rotation from 000 degree to 360 degrees. Find the insensitive point.
有时比你平时转动后脚步向内多一点可以帮助你更好在这个体式上保持平衡，如果对你是个问题的话。
Sometimes turning your rear foot a little more inward than you usually do can assist you in maintaining balance in the pose if that is a problem.
我们在后面将会看到，转动的物体能保持处于某一地点。
As we shall see later, a rotating object may remain at a place.
到这样一个时间点，金字塔将会逆转而停止转动。
Pyramids will invert and cease to spin in such a point in time.
因此，在转动的地球上发生两人路线交汇的这一静止点，除了这一“复式”(duplex)故事的叙述者外不会再有其他人注意。 “duplex”一词通常的意思是“双重的”，在电信术语里，它表示“信息从两头同时向对方传递的系统”(见《牛津英语词典》)。
"Duplex" as well asshavingsthe general meaning of "two-fold" applies in the jargon of electrical telegraphy to "systems in which messages are sent simultaneously in opposite directions"(OED).
他把手放在上面，门一下子朝里面打开了，铰链转动时没发出一点儿响声。
He laid his hand on them: and instantly they swung apart, opening inwards, turning on their hinges without the least noise.
结果表明，齿面弹性变形引起的齿轮轮齿的微小转动对啮合点的最终位置有一定的影响。
The results show that the micro rotational Angle induced by the tooth surface elastic deformation has definite effect on meshing points.
不要转动，把头放低一点，靠在椅子上。
Dont turn your head but lower it a little. Lean on the chair.
分析了采用半角转动法求中心点和圆周点以进行四杆机构综合的原理和方法。
The principle and method for quarto-rod can be analyzed as a device simply through rotation of the half Angle so as to find the central and circular points.
如果不能做到这一点，筒子的回转力矩会使它继续转动并退绕纱线，而退绕的纱线不能被卷绕到新卷装上。
If this is not done, the rotational momentum of the spool will cause it to remain in motion allowing yarn to be unwound without being taken up.
然后，针对能够整周转动的齿轮—五杆机构，研究了其上的一点在齿轮机构的传动比、初始相位角、杆长以及两杆之间的夹角变化时的轨迹曲线以及速度和加速度曲线的情况。
Then the locus curves of one point in the geared five-bar were studied with the change of the gear ratio, the phase Angle, the bar length and the Angle between two bars.
然后，针对能够整周转动的齿轮—五杆机构，研究了其上的一点在齿轮机构的传动比、初始相位角、杆长以及两杆之间的夹角变化时的轨迹曲线以及速度和加速度曲线的情况。
Then the locus curves of one point in the geared five-bar were studied with the change of the gear ratio, the phase Angle, the bar length and the Angle between two bars.
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