fluid curtain

例句：

1. 1. The fluid inside the container is moving around.
   容器内的流体在移动。
2. 2. The doctor advised him to stay hydrated by drinking plenty of fluids.
   医生建议他多喝水来保持水分。
3. 3. The scientist used a special fluid to dissolve the sample.
   科学家使用一种特殊的液体来溶解样本。