Most systems exist in temporarily stable states of equilibrium.
大多数系统存在于暂时稳定的平衡状态之中。
Equilibrium systems are very unhappy if you try to change them.
平衡系统，很不喜欢改变。
Systems in mechanical equilibrium have a common pressure.
成力学平衡的体系压力相同。
Systems in mechanical equilibrium have a common pressure.
成力学平衡的体系压力相同。
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