equimolar counter diffusion

例句：

1. 1.The process of equilibrium is crucial in the study of chemical reactions.
   平衡过程在化学研究中至关重要。
2. 2. In equilibrium, the concentration of reactants and products remains constant.
   在平衡状态下，反应物和产物的浓度保持不变。
3. 3. The equilibrium between two substances can be shifted by external factors.
   两种物质之间的平衡状态可以因外部因素而改变。