English: state in which both reactants and products are present in concentrations which have no further tendency to change with time.There are no net changes in the concentrations of the reactant and product . Such a state is known as dynamic equilibrium
Japanese: 可逆反応において、順方向の反応と逆方向との反応速度が釣り合って反応物と生成物の組成比が巨視的に変化しない状態