By means of the effective potentials and with the phase-plane method, the properities of the orbits of particles in the 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。
Finish Electric Dipole Radiation. Qualitative Aspects of Electric Quadrupole and Magnetic Dipole Radiation.31结束电偶极辐射之讨论。定性解释电四极特性及磁偶极辐射。
The effects of the energy, the angular momentum of particles and the mass quadrupole moment on the orbits of particles a讨论了粒子的能量、角动量和质量四极矩对于粒子轨道的影响。