equilibrium
noun [uncountable, singular]a state of balance, especially between different forces or influences 平衡；均衡；均势 Any disturbance to the body's state of equilibrium can produce stress. 对身体平衡状态的任何干扰都可能产生压力。 - in equilibrium
The point at which the solid and the liquid are in equilibrium is called the freezing point. 固体和液体的平衡点叫做冰点。 We have achieved an equilibrium in the economy. 我们已在经济上达到平衡。
a calm state of mind and a balance of emotions （心情、情绪）平静，安宁；心理平衡
Word Originearly 17th cent. (in the sense ‘well-balanced state of mind’): from Latin aequilibrium, from aequi- ‘equal’+ libra ‘balance’.