diffusion

• 指分子或粒子从高浓度区域向低浓度区域散开的过程，常用于物理、化学和生物学语境；也泛指事物向四周传播、扩散。

A noun referring to the process by which molecules or particles spread from an area of high concentration to an area of low concentration, often used in physics, chemistry, and biology contexts.

不可数

1. Molecular movementB2formalscientific

   The process by which molecules move from an area of higher concentration to an area of lower concentration.

   扩散

   • Diffusion of oxygen occurs across the cell membrane.
   • The perfume's diffusion through the room was rapid.
   • Scientists study diffusion to understand gas exchange in lungs.

   同义词dispersaldispersiondisseminationpermeationscatteringspread

2. Spread of lightB2formaltechnical

   The scattering or spreading of light rays, often to create a softer illumination.

   光线扩散

   • The frosted glass causes diffusion of the light.
   • Diffusion in photography softens harsh shadows.
   • The lamp's design allows for even diffusion of the glow.

   同义词dispersionscatteringspreadspreading

   反义词concentrationfocus

3. Cultural spreadC1formalpolitical

   The spread of cultural elements, ideas, or innovations from one society to another.

   文化传播

   • The diffusion of technology has transformed global communication.
   • Cultural diffusion occurs through trade and migration.
   • Historians study the diffusion of religious beliefs across continents.

   同义词circulationdispersiondisseminationpropagationspreadtransmission