fluid cylinder

例句：

1. 1. The liquid inside the container is clear and transparent.
   容器内的液体清澈透明。
2. 2. The liquid was so cold that it froze instantly.
   液体如此冷，立即就结冰了。
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。