acting surface

例句：

1. 1. The scientist is studying the effect of temperature on the activity surface of a chemical reaction.
   科学家正在研究温度对化学反应活性表面的影响。
2. 2. The new model car has an increased active surface area for better fuel efficiency.
   新款汽车拥有更大的活动表面积，以提升燃油效率。
3. 3.The researcher found that the increase in active surface area led to a significant improvement in the material's performance.
   研究者发现，增加的活动表面积显著提高了材料的性能。