Air is a fluid but not a liquid, while water is both a fluid and a liquid.
空气是流体不是液体, 水是流体也是液体.
Did the cleaning fluid work (on that stain)? ie Did it remove it?
这种洗涤剂(对那块污斑)管用吗?
The rate of flow of fluid, particles, or energy through a given surface.
流动率流体、微粒或能量通过一设定的表面时流动的速率