fluid catalyst

例句：

1. 1. The fluidity of the water is such that it can flow easily.
   水的流动性使得它能够轻易流动。
2. 2. The scientist used a fluid to dissolve the crystals.
   科学家使用一种液体来溶解晶体。
3. 3. The oil and gas industry uses a variety of fluids for drilling operations.
   石油和天然气行业使用各种液体进行钻探作业。