The action forces applied on rock mass of equivalent continuum by seepage include two parts, i. e., hydrostatic seepage pressure and hydrodynamic seepage pressure (seepage body force).

渗流对等效连续岩体的作用力包括渗透静水压力和渗透动水压力(渗流体积力)两部分。

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Due to the dragging force, trajectories of spacecraft circling planetoid can departure from the standard taper curve orbit which is obtained by the two-body hypothesis.

绕小行星运行的航天器由于受到摄动力的影响，运行轨迹会偏离二体假设下的圆锥曲线轨道。

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There are for features for the new method as follows: (1) The stability criterion for the rigid body and the pitch angle of the force between two strips will be deduced according to the energy method.

这种新方法主要有如下四个特点： （1）用能量的观点推导适合刚体的稳定性判据和条间力的倾角。

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