以下为句子列表：
英文: Abstract: According to the similar nature of gravitational field and electrostatic field, using analogy method, the stress tensor in gravitational field is obtained from Maxwells stress tensor in electrostatic field, and the universal gravitation inside t
中文: 文摘:根据引力场和静电场的相似性质，通过类比方法由静电场的麦克斯韦应力张量得出了引力场中的应力张量，并用它计算了均质球体内部的万有引力.
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英文: Bodies traveling in a gravitational field are always undergoing an exchange of gravitational and kinetic energy.
中文: 在重力场中运动的物体会不停地改变其动能与重力位能。
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英文: But unlike balls near the earth's surface, CDM particles move in a gravitational field that is not constant.
中文: 不过CDM粒子所经历的重力场和地球表面附近的重力场不同，并不是强度固定的重力场。
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英文: By means of the effective potentials and with the phase-plane method, the properities of the orbits of particles in the gravitational field with mass quadrupole moment are studied.
中文: 摘要通过等效势能图，并利用相平面分析的方法，研究了质量四极矩引力场中粒子轨道的性质。
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英文: Einstein's magnum opus, general relativity explains that concentrations of matter or energy cause spacetime to curve and that this curvature deflects the trajectories of particles, just as should happen for particles in a gravitational field.
中文: 广义相对论是爱因斯坦的杰作，它说物质或能量的聚集会导致时空弯曲，同时这个曲率会让粒子轨迹转弯，这正是重力场中粒子该有的行为。
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