diffusionKK [dɪˋfjuʒən] /dɪˈfjuʒən/發音dif- 分開+fus 傾注、流+-ion 名詞→分散流開展開收合dif-字首分開fus字根傾注、流-ion字尾名詞字面:分散流開物質或消息向四處流開 → 擴散、傳播名詞1擴散、瀰散物理、化學Diffusion moves oxygen from the lungs into the bloodstream.擴散作用讓氧氣從肺部進入血液中。2傳播、散布The diffusion of new farming techniques changed the whole region.新農耕技術的傳播改變了整個地區。3漫射、散射光學A thin cloth over the lamp gives a soft diffusion of light.在燈上蓋一層薄布,就能讓光線柔和地漫射。4分散、分攤In large groups, the diffusion of responsibility makes people less likely to help.在大團體中,責任的分散會讓人比較不願意出手幫忙。