diffusion control

例句：

1. 1.The process of diffusion controls the movement of gases through a material.
   扩散过程控制气体通过材料的运动。
2. 2. The diffusion control system is designed to prevent contamination in industrial processes.
   扩散控制系统设计用于防止工业过程中的污染。
3. 3.The diffusion control measures were implemented to reduce emissions from the plant.
   实施了扩散控制措施以减少该工厂的排放。