dilute phase

例句：

1. 1.The dilute phase of the reaction is where the chemical changes occur.
   反应的稀释阶段是化学变化发生的地方。
2. 2. During the dilute phase, the concentration of reactants is very low.
   在稀释阶段，反应物的浓度非常低。
3. 3. The dilute phase of the solution is important for understanding its properties.
   溶液的稀释阶段对于理解其性质非常重要。