activity coefficient

例句：

1. 1. The activity coefficient of a gas is the measure of how much it reacts with other substances.
   气体的活性系数是衡量它与其他物质反应的程度。
2. 2.In thermodynamics, the activity coefficient of a solute in solution is used to describe its ability to dissolve in a solvent.
   在热力学中，溶质在溶液中的活性系数用来描述其溶解能力。
3. 3. The activity coefficient of a gas is important for predicting the behavior of gases in chemical reactions.
   气体的活性系数对于预测化学反应中气体的行为非常重要。