For some viruses the encounter with a surface is probable diffusion-limited. 有些病毒與表面接觸可能受到擴散的限制。
In the process of synchronizing the die-cutting, die-cutting edge full length and die-cutting material surface contact. 在同步模切工藝中,模切刀刃的完整長(cháng)度與模切材料的表面接觸。