fluid

• 形容物质容易流动，像液体一样；也形容事物不是固定的，可以平滑、灵活地变化。

Describes something that flows easily, like a liquid, or something that is not fixed and can change smoothly.

1. Flowing easilyB1formal

   Able to flow freely, like a liquid or gas.

   流动的

   • The substance remains fluid at room temperature.
   • Water is a fluid substance that takes the shape of its container.
   • The lava was so fluid it moved quickly down the slope.

   同义词flowingliquefiedliquidrunny

   反义词solidthickviscous

2. Smooth and gracefulB2formal

   Moving or changing in a smooth, continuous, and effortless way.

   流畅的

   • Her dance movements were fluid and elegant.
   • The conversation was fluid and natural.
   • The car's acceleration was remarkably fluid.

   同义词elegantflowinggracefullithesmoothsupple

   反义词awkwardclumsyhaltingjerkystiffungraceful

3. Not fixed or changeableB2formal

   Likely to change; not stable or permanent.

   不固定的；易变的

   • The political situation remains fluid and unpredictable.
   • Our plans are still fluid and may change.
   • The company's structure is fluid, adapting to new needs.

   同义词changeabledynamicfluctuatinginconstantmercurialmutableshiftingunsettledunstablevariablevolatile

   反义词constantfixedimmutablepermanentrigidstablestatic

• 指能自由流动、可改变形状以适应容器、并能承受剪切力的物质，包括液体和气体。在生理学中指体液。

A noun referring to a substance that flows freely, such as a liquid or gas, and can change shape according to its container.

1. B2formalscientific

   A substance that flows freely and takes the shape of its container, such as a liquid or gas.

   流体（液体或气体）

   • Water is the most common fluid on Earth.
   • The mechanic checked the brake fluid in the car.
   • Air is a fluid that surrounds us.

   反义词solid

2. Body fluidB2formalmedical

   A liquid substance produced by the body, such as blood, saliva, or lymph.

   体液

   • The doctor analyzed the spinal fluid sample.
   • Dehydration reduces the amount of bodily fluids.
   • The nurse collected a sample of the patient's fluid for testing.

   同义词bodily fluidbody fluidhumorliquidsecretion