最好有埋中文解釋.
吾好只系copy一段野比我..
除左diffusion is the movement of molecules of gases and liquids from a region of high concentration to a region of low concentration.
Osmosis is a region of low concentration to a region of high concentration through a selectively permeable mambrane.
(系咪一定要有membrane?)
更新1:
詳細最好.