fluidity

例句：

1. 1. The liquid flowed smoothly through the tube.
   液体顺利地通过管子。
2. 2. The water is very fluid and can be poured easily.
   水非常流动，可以轻易地倒出来。
3. 3. The new design has improved the fluidity of the machine.
   新设计提高了机器的流动性能。