This regime is termed mass transport or diffusion limited. 这种方式被称作质量输送或扩散控制。
The knowledge of diffusion is crucial in many processes because reactions and separations are often limited by a diffusional process. 摘要许多过程都涉及扩散控制的传质,相应的扩散速率计算对过程工程的精确量化具有重要意义。