本文根据作用在土单元体上力的平衡条件，研究了粘性土的土压力非线性分布问题。
According to the equilibrium conditions of forces acting on a soil element, the problem for non-linear distribution of earth pressure of cohesive backfill is studied.
工程结构构件在正常使用载荷作用下，根据结构的正常使用承载力极限状态的要求，必须满足力的平衡条件，即构件不发生失稳现象。
According to requirements of the structural serviceability limit state, the members in structure must be satisfied the equilibrium in practice to avoid instability.
静电平衡条件下，孤立带电导体表面任意一点的电荷处于其它电荷激发的电场中，因此受到其它电场斥力的作用，此力即为文章所讨论的表面张力。
In electrostatic field, the charges on the isolated conductor surface are repelled by the other charges, which is defined as surface repulsive force discussed in this paper.
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