旋转的陀螺正在失去动量。
孩子盯着旋转的陀螺。
长期以来，这种密度上的相似性促使人们猜测月球是从快速旋转的地球上分裂出来的，但这种想法创始于两次观测。
This similarity in density has long prompted speculation that the Moon split away from a rapidly rotating Earth, but this idea founders on two observations.
男孩子们先从不断旋转的圈里掉出来了。
这些镜子可以在几千英里的高空以地球绕地轴旋转的速度运行。
The mirrors could orbit—thousands of miles high—at the same speed as the earth turns on its axis.
世界上近五分之一的电力是由利用落水动力旋转的水轮机产生的。
Nearly one fifth of all the electricity generated worldwide is produced by turbines spun by the power of falling water.
观测表明M87星系的气体云围绕星系中心旋转的速度异常快。
Observations indicate that gas clouds in galaxy M87 are whirling unusually fast about the galaxy's center.
行星被认为是由围绕恒星旋转的气体和尘埃组成的圆盘中的粒子累积而成。
Planets are believed to emerge from the accretion of particles in a disk of gas and dust as they whirl around the star.
弥尔顿想屹立于现实世界旋转的柱子之上，去描绘无形世界中神的来来往往。
Milton intends to soar above the wheeling poles of the visible world and describe the otherwise invisible comings and goings of the gods.
这种以每秒数百公里的速度旋转的运动，可能会使圆盘上的物质呈现出螺旋形状。
This spinning motion, at speeds of hundreds of kilometers per second, may cause matter in the disk to take on a spiral shape.
如果我旋转的速度比桶倒过来的两秒钟还快，要是物理原理成立，水就不会掉出来。
If I rotate this faster than in two seconds when the bucket is upside-down if physics works, the water should not fall out.
它们中的一些可能是顺时针旋转的，在这种情况下，根据右手定则，我们认为它们是向下旋转的。
Some of them might be spinning clockwise, in which case, according to the right-hand rule we would consider them spin-down.
我们的银河系实在庞大，吸引着数十个较小的星系环绕着它奔跑，恰似环绕巨大行星旋转的卫星。
Our galaxy is so huge that dozens of lesser galaxies scamper about it, like moons orbiting a giant planet.
最初，它的顶部有旋转的刻度盘和其他指示物，上面的字母和图画描绘了太阳、月相和不同的星座。
In its original state, there were rotating dials and other indicators on the top, with letters and drawings showing the Sun, the phases of the moon and different constellations.
为了每小时挣20便士，他整天站在旋转的生产线旁，用手肘做着同样的微小机械动作，天天如此。
He stood at a whirring line all day, every day, making the same tiny mechanical motion with his wrist, for 20 pence an hour.
虽然木星不能够把地球从围绕太阳旋转的轨道上拉出来，但是它对地球的引力也产生了相当大的作用。
Though Jupiter is not able to draw the earth out of its course round the sun, yet it attracts the earth to some extent.
没有人在听。每个人都挤在800张赌台的周围，目不转睛地盯着翻开的纸牌、旋转的轮盘或者滚动的骰子。
No one is listening. Everyone is jammed around the 800 tables, focused on the flip of cards, the spin of the roulette wheel or the roll of dice.
这台机器是如此精确，以至于人类的头发甚至不能从头部和旋转的磁盘之间穿过，但它的运转速度却是惊人的。
This machinery is so precise that a human hair couldn't even pass between the heads and spinning platters, yet it all works in terrific speeds.
在法国拉斯科洞穴中发现了冰河时代晚期的绳索，这条绳索由向右旋转的纤维捆成，因此它是由右撇子编成的。
The late Ice Age rope found in the French cave of Lascaux consists of fibers spiraling to the right, and was therefore tressed by a righthander.
关于这种新形式的教学应用最好的例子之一是Futaba，在这个游戏中，四个孩子尝试去识别一个旋转的物体，然后识别它是什么。
One of the best examples of this new form of teaching application is Futaba, game in which up to four children try to recognize a spinning object, and then identify what it is.
其他快速旋转的恒星包括阿尔法星、昴宿星、织女星和阿克纳星。
Other rapidly rotating stars include Alpha Arae, Pleione, Vega and Achernar.
旋转的角动量会开始，跟随那个力。
这有一个旋转的角动量,如你们所见。
这就和旋转的事实对应上了。
有了一个旋转的角动量，就变得稳定。
或者，这样想,它是，电子旋转的动能。
So another way to think about that is just the rotational kinetic energy of our electron.
旋转的角动量会怎样呢？
旋转的角动量会怎样呢？
应用推荐