1·There are data on the rates of diffusion of molecules.
有一些关于分子的扩散速率的数据。
—— 《柯林斯英汉双解大词典》
2·Whereas purposeful men could make their way across a narrow bridge, the slow diffusion of plant and animals would require an avenue as a continent and available for ages at a stretch.
有目的的人可以通过一座狭窄的桥，而植物和动物的缓慢扩散则需要一条像大陆一样的道路，而且需要很长时间才能使用。
3·At low Peclet numbers, diffusion dominates.
在低沛克莱数下，扩散占主导地位。
4·Although longitudinal diffusion is most rapid, it is of practical importance.
虽然纵向扩散速度最快，但其具有重要的现实意义。
5·Stimulus diffusion refers to an element of one culture leading to an invention in another.
刺激扩散指的是一种文化元素导致另一种文化的发明。