This regime is termed mass transport or diffusion limited. 這種方式被稱作質量輸送或擴散控制。
The knowledge of diffusion is crucial in many processes because reactions and separations are often limited by a diffusional process. 摘要許多過程都涉及擴散控制的傳質,相應的擴散速率計算對過程工程的精確量化具有重要意義。