Eleven point two kilometers per second, at which satellites can be freed from the gravitation of the earth, is called "escape speed".
卫星以11.2千米每秒的速度前进可以脱离地球引力，这被称为“逃逸速度”。
One of them is the force of gravitation (地心引力), which tries to pull the satellite towards the earth and is like a rope which keeps the satellite from flying away.
其中一个是地心引力的力量，这股力量试图把卫星拉向地球，就像一根把卫星绑住的绳子，防止卫星飞远了。
This is called gravitation, or gravity.
这叫引力。
Finally he found the great gravitation law.
最后他发现了伟大的引力定律。
Everybody knows that. It's the property of gravitation.
这就是万有引力的性质，我们都很了解了。
It is gravitation that makes things have weight.
正是引力使一切东西具有重量。
A body that has very little matter has very little gravitation.
一个天体所含的物质很少，它的引力也很小。
Newton's law of universal gravitation has been extremely useful.
牛顿的万有引力定律是极其有用的。
When there is no gravitation , our feet no longer stay on the ground .
如果没有地心吸力，我们的脚就不能再站在地面上了。
Secondly, the strength of gravitation depends on the distance between the bodies.
其次，引力的强度还取决于天体之间的距离。
In these two chapters, the author expounds the law of universal gravitation.
在这两章里，作者详尽阐述了万有引力定律。
I don't like electricity, but I'm interested in the law of universal gravitation.
我讨厌电学，但我对万有引力定律感兴趣。
Now take the fundamental case, forget about gravitation and weird things like that.
现在先来看下基本的例子，把诸如万有引力那些的奇怪事物先放在一边。
Today's topic is curved space and its relation to the phenomena of gravitation.
今天的主题是弯曲空间及它和重力现象的关系。
The potential equation had figured in the eighteenth-century work on gravitation.
位势方程在十八世纪关于引力的研究中已显露头角。
The law of universal gravitation helps us predict accurately the orbit of a spacecraft.
万有引力定律帮助我们精确计算宇宙飞船的轨道。
One biographer credits him with "discovering gravitation," and where would we be without that?
传记作家把“发现万有引力”归功于他，如果他没有发现这一事实，我们会变成什么样呢？
And that is a rather deep purely mathematical consequence of understanding gravitation in this way.
以这种方式理解万有引力，是纯数学的一个十分深刻推论。
For example, the earth has more matter than the moon, so the earth's pull or gravitation is stronger than the moon's.
比如，地球比月球含的物质多，所以地球的拉力或引力就比月球大。
Sometimes I think the discovery of gravitation perhaps should be credited to those apples falling on Newton's head.
有时候我想地球引力的发现也许应该归功于那几只落在牛顿头上的苹果。
Since the establishment of general relativity, quite a number of observations have supported this theory of gravitation.
自从爱因斯坦创立广义相对论以来，大量的天文观测证实了这一 引力理论的正确性。
But his opinions never fluttered or drooped; he was as impartial to cities, countries and continents as the winds or gravitation.
他的见解决非飘浮不定或令人沮丧，他对不同的城市、国家和各大洲都是不偏不依，有如吹风和万有引力一样自然。
To consult the rules of composition before making a picture is a little like consulting the law of gravitation before going for a walk.
拍摄前遵循构图法则有些像在走路前要遵循地球引力一般。
Modern physics thinks that there are 4 kinds of force in the universe: electromagnetic force, gravitation, strong force and weak force.
现代物理学认为宇宙中存在4种力：电磁力、万有引力、强力和弱力。
Many people had seen apples fall, but it took the observant eyes of Newton to discover the law of gravitation from this common occurrence.
许多人都看过苹果落地，但是需要牛顿的善于观察的眼睛去从平常的现象中发现万有引力定律。
As the planet approached its current size, however, its gravitation became strong enough to hold gases and water vapor around it as an atmosphere.
然而，当行星接近现在的大小的时候，它的重力强到了足以保持其周围的气体和水蒸气来形成大气层。
this made it eventually possible to assume that the motion of the moon and the fall of a body on earth could be governed by the same law of gravitation.
由此就可以假定月球的运动以及物体的落地都受同样的引力规律控制。
this made it eventually possible to assume that the motion of the moon and the fall of a body on earth could be governed by the same law of gravitation.
由此就可以假定月球的运动以及物体的落地都受同样的引力规律控制。
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