equilibrium problem

• 平衡问题

equilibrium problem的用法和样例：

例句

1. We consider the equilibrium of a small element cut out of the body.
   我们考虑从物体中切取的一个小微元体的平衡问题。
2. The problem of thermospheric heat balance may also be written in time-dependent form.
   热层的热平衡问题亦可以写成与时间有关的形式。