The number of thermodynamic variables, such as temperature and pressure, required to specify a state of equilibrium of a system, given by the phase rule. 变化，变异相律提供的，要求详述某一系统的平衡状态的热力学变量数目，如温度和压力
A device that brings about and helps maintain equilibrium. 平衡器可以帮助达到平衡或保持平衡的装置
This pair of scales is not in equilibrium. 这个天平不平衡。
He can't maintain enough equilibrium to ride a bike. 他骑自行车不能保持平衡。
