连接在蒸汽机上的旋转式发动机使轴承转动，机器得以驱动，从而使得利用蒸汽动力纺线和织布的工厂出现。
A rotary engine attached to the steam engine enabled shafts to be turned and machines to be driven, resulting in mills using steam power to spin and weave cotton.
另一些观点包括制造一种检测器来试验原子核的旋转动量能否被测量出，或者运用该技术来制造超灵敏的触角。
Other ideas include building a detector to see if the spin of an atomic nucleus can be measured, or using the technique as an ultrasensitive antenna.
其中一个珠子用针固定在玻璃表面，它转动的时候另一颗珠子就会围绕着它旋转。
One of the beads was pinned to a glass surface so that as it spun the other rotated around it.
现在我想知道这些的,旋转动能是多少。
Now I want to know how much kinetic energy of rotation these objects have.
在旋转时，力变成力矩，质量变成转动惯量，加速度变成角加速度。
In rotation, force becomes torque, mass becomes moment of inertia, and acceleration becomes angular acceleration.
关于这个轴的,旋转动动量是多少？
What is the moment of inertia for rotation of a rod about this axis?
这个旋转动能，可以，转换为电力，或者其他形式的能量。
And this rotational kinetic energy can then be, perhaps, converted into electricity or in other forms of energy.
绿灯亮起之时，将其转换回来，将旋转动能，转化为直线动能，你又再往前行进。
And when the traffic light turns green, you convert it back rotational kinetic energy into linear kinetic energy and you keep going again.
也许太阳转速正减慢，也许我们得到的能量,不是别的，而是旋转动能。
Maybe the sun is spinning down, is slowing down and maybe the energy that we get is nothing but rotational kinetic energy.
我准备给这飞轮，很多的旋转动能，一会儿你们就能看到。
I'm going to give this flywheel a lot of kinetic energy of rotation, and you will see shortly how I do that.
晶体学家们一直认为所以的晶体都具有旋转对称性，这样当它们转动起来时候，从各方面来看都是一样的。
Crystallographers always believed that all crystals have rotational symmetry, so that when they are rotated, they look the same.
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.
然而，如果考虑旋转动能，情况就不同了，因为这个中子星，旋转一周是33毫秒。
However, if you look at rotational kinetic energy, the situation is very different, because this neutron star rotates in 33 milliseconds about its axis.
他们加入若干旋转动作组合和精彩的抬举动作。
毫无疑问，在这个，旋转中子星的例子里，所有辐射的能量，都是以旋转动能，为代价。
So there's no question that in the case of this rotating neutron star, all the energy that it radiates is at the expense of rotational kinetic energy.
这样你也能,得到旋转动能,再次转化它,变成别的能量。
So you should also be able to get the rotational kinetic energy out and convert that again into forward motion.
不用说，这巨大的，旋转动能，肯定储藏在行星中，我要多花些时间，来讲这个。
Needless to say that huge amount of rotational kinetic energy must be stored in planets and in stars, and I would like to spend quite some time on that.
首先讨论太阳，然后是地球，看看地球和太阳中，具有多少旋转动能。
I will first discuss with you the sun and the earth and see how much rotational kinetic energy is stored in the earth and in the sun.
现在我们有一个计算，旋转动能的方法，如果我们知道，怎样计算转动惯量。
So we now have a way of calculating the kinetic energy of rotation provided that we know how to calculate the moment of inertia.
它们有时做旋转动作和盘旋动作。
太阳的旋转周期是，26天，地球是一天，最后把一切转化成，米千克秒的单位，得到旋转动能的数据。
Well, the sun rotates about its axis in 26 days, the earth in one day, and so I finally convert everything to MKS units and I find these Numbers for the rotational kinetic energy.
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.
考虑添加其他手势识别，例如通过从synclient输出中进一步提取特征来识别按压旋转动作。
Consider adding additional gesture recognition, such as pinch rotate through further feature extraction from the synclient output.
十亿年以后，你们就已经消耗完,所有的旋转动能,然后地球就不会再旋转。
then, you would have consumed up all the rotational kinetic energy and then the earth would no longer be rotating.
旋转动能是，2亿焦耳，每个飞轮都是。
And that kinetic energy of rotation is, then, a whopping 200 million joules in each of those rotating flywheels.
它们运用这，旋转动能，来制造巨大的磁场，用时只有5秒。
Now, they use this rotational kinetic energy to create very strong magnetic fields on a time scale as short as five seconds.
每一组收缩都会对环绕在传动轴上的项圈产生压力，于是，这些搏动的肌肉会一齐连续地挤压传动轴，形成转动力，从而产生旋转。
As they do so, each pair applies pressure to a soft ring around the driveshaft. The pulsating muscles collectively and continuously pinch the shaft and apply a rotational force, causing it to turn.
风吹动叶片旋转，叶片带动连接发电机的轴转动产生电流。
The wind spins the blades, which turn a shaft connected to a generator that produces electricity.
它的眼睛是旋转式的，能够个别转动，如此一来它可以同时注视两个不同的物体！
Its eyes are turreted and can be moved independently so that it can view two different objects simultaneously!
它的眼睛是旋转式的，能够个别转动，如此一来它可以同时注视两个不同的物体！
Its eyes are turreted and can be moved independently so that it can view two different objects simultaneously!
应用推荐