fluid relief

例句：

1. 1. The fluidity of the water makes it easy to pour.
   水的流动性使得它容易倒出。
2. 2. The liquidity of oil allows it to flow easily.
   油的流动性使得它容易流动。
3. 3. The fluidity of the river is affected by the current.
   河流的流动性受到水流的影响。