地球引力

Planet Earth is heavy, so heavy in fact that to get off it, you have to do this.

地球是十分重的，要摆脱它的引力，就要出动这个大家伙了。

The analytical method is always used due to the large amount of the objects and not very high accuracy of forecasting. A method based on the position and velocity derived from the mean orbit elements directly is given, which is to avoid the problem of singularity in calculating the periodic terms of orbit elements variation, thus the process and software can be simplified.

在已有分析法得到t时刻平均根数的基础上给出一种轨道预报方法，由t时刻的平均根数给出该时刻卫星的位置和速度，在此基础上将地球非球形引力摄动的周期项直接用卫星直角坐标的位置和速度分量表示，这样可以避免在计算轨道根数变化的周期项时出现的奇点问题，从而对根数的选择无特殊要求，可适用于各种轨道，简化预报程序和相应的软件，提高预报效率。

According to introduction, they make use of Europe south the astronomical observatory establish in 3.6 meters caliber astronomical telescope of the Chile a set of the mountain lodge of 2400 meters saddle type of an elevation, confirm Be located on south the fixed star"Gliese 581" inside the along while ball scales horoscope see toward the speed because it surroundings can't see fixed star of gravitation function but"perturbation" for appear, subsequently reckon this a red and short star neighborhood of"new the Earth" round a mother fixed star of revolution around sun period and quality.

根据行星的介绍，他们利用欧洲南方使用建立天文台3.6米口径的智利一集的山2400米的海拔马鞍型，提出确认将于南部的恒星"格里斯581"所在的内沿，同时对球尺度占星速度见的天文望远镜因为它周围看不到固定的引力作用，但"摄动出现，随后估计这是一个红色的和短期的"新地球"轮明星邻居母亲围绕太阳固定期限和质量革命之星"的明星。

In the astronomy aspect, in 1672 Newton has formulated the reflecting telescope; He also explained not only the tide phenomenon, points out the tide the size the same lunar month related, moreover also has the relations with sun's attraction; Moreover, Newton extrapolated theoretically Earth is not a spheroid, but is the two-pole is slightly flat, the equator slightly drum, and explained the year old bad phenomenon from this and so on.

在天文学方面，1672年牛顿创制了反射望远镜；他还解释了潮汐的现象，指出潮汐的大小不但同朔望月有关，而且与太阳的引力也有关系；另外，牛顿从理论上推测出地球不是球体，而是两极稍扁、赤道略鼓，并由此说明了岁差现象等。

Gravity, acting on the gases between the stars, will ultimately reincorporate these elements into new clouds, stars, planets, and perhaps even living beings like ourselves.

作用於宇宙星体之间气体的引力，最终将再次凝聚这些气体与元素，形成新的星云、恒星、或是行星，甚至培育出像我们的地球上一样的生物。

He discovers suddenly, tellurian gravitational force is very large, let him besides cannot flicker flicker ground flies besides, also do not have even the friend a few.

他突然发现，地球上的引力很大，让他除了不能忽悠忽悠地飞翔之外，连朋友也没有几个了。

A clever boy and a thickheaded child to oral exam, the teacher ask clever boy,"Who invented the electric light,""Edison" and "who discovered the ray","Madame Curie", who discovered the earth gravity ",","100 points, Newton, intelligent children to help the answer thickheaded child told him, the teacher asked," Who is your dad,""," your mama Edison who is ","Madame Curie","who told you,""Newton".

一个聪明的孩子和一个笨孩子去考口试，老师问聪明的孩子；"谁发明了电灯"，"爱迪生"，"谁发现了雷"，"居里夫人"，谁发现了地球有引力"，"牛顿"，100分，聪明的孩子为了帮笨孩子把答案告诉了他，老师问；"你爸是谁"，"爱迪生"，"你妈是谁"，"居里夫人"，"谁告诉你的"，"牛顿。

By discussing the basic hypotheses about the continuous orbit and discrete orbit in two research directions of the background medium theory for celestial body motion, the concrete equation forms and their summary of the theoretic frame of celestial body motion are introduced. Future more, by discussing the general form of Binet's equation of celestial body motion orbit and it's solution of the advance of the perihelion of planets, the relations and differences between the continuous orbit theory and Newton's gravitation theory and Einstein's general relativity are given. And by discussing the fractional-dimension expanded equation for the celestial body motion orbits, the concrete equations and the prophesy data of discrete orbit or stable orbits of celestial bodies which included the planets in the Solar system, satellites in the Uranian system, satellites in the Earth system and satellites obtaining the Moon obtaining from discrete orbit theory are given too.

在深入研究引力理論及廣義相對論的基礎上，通過討論天體運行背景介質理論的連續軌道及離散軌道這二個研究方向的基礎假設，介紹了天體運行軌道的具體方程形式及理論框架概要；進一步地通過討論天體運行軌道Binet方程的一般形式及其行星近日點進動角的解，給出了連續軌道理論與Newton理論及Einstein廣義相對論的聯繫與區別；通過討論天體運行軌道的分維擴展方程，給出了包括太陽系行星、天王星衛星、地球衛星、繞月航天器等在內的離散軌道方程及其預言資料。

Once out of the earth's gravity, the astronaut is affected by the problem of weightlessness.

一旦脱离地球的引力，宇航员就会受到失重问题的影响。

Once out of the earth's gravity, an astronaut is affected by still another problem—weightlessness.

译：一旦离开了地球的引力范围，宇航员又遇到了另一个问题—失重。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。