By means of the metric for the celestial body with electric-magnetic charge, magnetic momentum and quadrupole moment, some gravitational effect are studied.

本文利用具有电（磁）荷、磁矩和质量四极矩引力场方程的解，讨论了具有电（磁）荷、磁矩和质量四极矩天体的某些引力效应。

youdao

The neutron stars rotate around, - we discussed that earlier-- - conservation of angular momentum-- and they have strong magnetic fields.

之前我们讨论过，角动量守恒-,它们有很强的磁场-,这物体。

youdao

A magnetic space sail would also rely on the solar wind for momentum.

磁驱动空间帆同样依赖太阳帆产生动能。

youdao

Maglev technology has been around for years as the propulsion method behind certain European and Asian trains, and basically involves using the Physics 101 properties of magnetic attraction and repulsion to provide an object with momentum.

ENGADGET: Maglev elevators to scare us all by 2008