经过这样的分析会发现，牛顿定律在以遥远星系为不动的参考系中有效。
Once this analysis is done, it is clear that (for non-relativistic speeds, at least!) Newton's laws work in a frame in which the distant galaxies do not rotate.
牛顿力学：牛顿第一、二、三定律，惯性和非惯性参考系，牛顿守恒定律，力和潜能，重力场，向心力，低频振荡。
Newtonian dynamics: first, second and third laws, inertial and non-inertial reference frames, conservation laws, forces and potentials, gravitational field, central forces, small oscillations.
本文以太阳系质心参考系为基础推导了VLBI时延和引力延迟的后牛顿表达式；
The relativistic geometric time delay of VLBI is derived in the Barycentric Reference System (BRS).
本文以太阳系质心参考系为基础推导了VLBI时延和引力延迟的后牛顿表达式；
The relativistic geometric time delay of VLBI is derived in the Barycentric Reference System (BRS).
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