Fluid movements or lines or designs are smooth and graceful.
His painting became less illustrational and more fluid.
他的绘画不再那么呆板了,而变得自然流畅起来。
fluids
A fluid is a liquid.
The blood vessels may leak fluid, which distorts vision.
血管可能渗漏出液体,造成视力模糊。
Make sure that you drink plenty of fluids.
一定要饮用大量流质。