Now in order to explain the motion of Venus in the sky, it's a bit more of a problem, you see Venus as we know now is closer to the sun that the earth is.
接下来想要解释，金星在天空中的运动就比较麻烦了，据我们所知相比其地球来说，金星离太阳更近。
Astronauts look weightless because they are in continuous freefall towards the Earth, staying aloft because of their horizontal motion.
宇航员表明上看起来是失重的，那是因为他们在不停地往地球方向做自由落体运动，而他们在水平方向上的运动又使他们保持着漂浮的状态。
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。
One way to see this is to compare the energy of a nuclear blast to that of the rotational motion of the Earth.
有一种方法可以说清楚这个问题：即把核爆炸的能量与地球转动的能量作一次比较。
John Mitchell, an English physicist and astronomer, was inspired by it to put forward the first theories of wave motion in the earth.
约翰·米切尔，英国物理及天文学家，由此得到灵感并提出了第一个地球内部波动理论。
If you look at the motion of the planets in the sky, you will find that they don't simply go around the earth in a continuous circle.
抬头仰望天空中行星的运动，你将会发现它们并不是简单地绕着地球旋转。
The Sun (and anything warm) is constantly emitting infrared, and the Earth absorbs it and turns the energy into atomic and molecular motion, or heat.
太阳（和其它任何热的物体）持续辐射红外线，地球吸收红外辐射，并将它转换为原子或分子的运动，即热。
Newton took the principles of motion and of gravitation as deduced from observations of earthbound objects and extended them to the motions of the earth and of the planets around the sun.
牛顿观察物体往地上落，演绎出运动原则和引力原则，并将这些原则扩展到地球的运动和环绕太阳运转的行星的运动。
In comparison with the classical lunar theory the motion of an earth satellite offers important practical differences.
与经典的月球理论相比较，地球卫星的运动有显著的实际差别。
Therefore, the increase of the phenomenon of Earth's volume, while the quality of growth is the cause of the Earth, Earth's mass increases because of its retrograde motion.
因此，地球体积的增大是现象，而地球的质量增长是原因，地球质量的增大是其退行运动原因。
Study on the earth with a variety of astronomical state of motion and mechanical mechanisms of disciplines, is astrometry intersection of science and earth science.
用天文学方法研究地球的各种运动状态及其力学机制的学科，是天体测量学与地学交叉的科学。
It didn't make much sense to Galileo to have different rules for motion on earth and in space.
对伽利略来说，地球上和太空中有不同的运动法则是没有多大意义的。
Recent observations on microwave background radiation and distribution of distant radio galaxies demonstrate that there exists dipole anisotropy in relation to the motion of the Earth.
近年来通过对“微波背景辐射”及遥远射电星系发出的射电波的观测表明，它们存在一与地球运动相关的各向异性。
The rotation of the Earth includes precession, nutation, variations of the rotation rate and polar motion.
地球自转运动包括岁差和章动，极移和日长的变化。
As an organic whole, the earth is not only uninterrupted motion and change, but continual evolution. This evolution has its inherent laws.
地球是个有机整体，该整体不仅在不停地运动和变化，而且还在不断地进化，这种进化有其固有的规律。
This article expounds again whether the mechanical energy is in the uniform motion in a straight line, as the mechanical energy is conservative when the system is in the frame of earth reference.
本文针对系统相对于地球参照系机械能守恒时，在相对于地面作匀速直线运动的参照系中机械能是否依然守恒的问题进行了重新论证。
Astronomy enthusiasts often enter this field as hobbyists, using binoculars or a telescope to observe the motion of planets or artificial satellites orbiting the earth.
很多天文爱好者最初对该领域的研究都是从业余爱好开始的，他们会用双筒望远镜观察星系的变化，观察人造卫星环绕地球运行的规律。
Water on the earth is in constant motion between the great natural cycle and small social cycle.
地球上的水处于自然大循环和社会小循环交织成的往复循环运动之中。
Chaotic attitude motion of a magnetic rigid spacecraft in a circular orbit of the earth is treated.
研究在地球万有引力场和磁场中的磁性刚体航天器在圆轨道上的混沌姿态运动。
But it was a playing, an imitating, that interfered with what had already been set in motion, and thus the stream of mind carrying out the plan for earth gradually drew souls into its current.
但这是一种游戏、一种模仿，这干涉了已经置于运动中的事物，因此执行地球计划的心灵潮流逐渐将灵魂吸收进来。
When we usually discuss the projectile motion problems we usually neglect the rotation of the earth in classical mechanics.
针对经典力学中忽略地球自转来处理抛体运动的问题，考虑地球自转的影响，建立了抛体运动的动力学方程。
Two kinematic models of tectonic block motion on the earth surface are discussed.
讨论了构造块体在球面上运动的两种运动学模型。
During these periods of re verse or retrograde motion they appear brighter and larger in the sky, suggesting either that they are variable or that they have moved closer to the Earth.
在逆转或倒退的运行时，它们变得更大更亮，预示着它们或是变化的，或是距离地球近了。
In the gravitational field of the earth, negative energy corresponds to bounded motion and positive energy to unbounded motion.
在地球的重力场中，负的能量相应于有界限运动，正的能量相应于无界限运动。
Undulation is one of the fundamental models of the geological effect, the undulation motion and variation in shape of earth crust is an geologic facts.
波动是地质作用的基本形式之一，地壳的波状运动和变形是客观存在的。
In a moving train one feels out of balance, the earth seems to be constantly moving and your mind has only the horizon as a reference, all the others things are constantly in motion.
在一列运动中的火车上，人们感觉不到平衡，大地在不断地移动，在你的脑中只有地平线是参照物，其他所有的东西都在运动。
In a moving train one feels out of balance, the earth seems to be constantly moving and your mind has only the horizon as a reference, all the others things are constantly in motion.
在一列运动中的火车上，人们感觉不到平衡，大地在不断地移动，在你的脑中只有地平线是参照物，其他所有的东西都在运动。
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