mass noun
1
- the action or process of flowing or flowing out流, 涌流; 流出：
the flux of men and women moving back and forth
来来往往的男男女女
count noun a localized flux of calcium into the cell.进入细胞的局部钙流。
1.1
- count noun Medicine an abnormal discharge of blood or other matter from or within the body【医】（血等体液的）流出, 溢出。
1.2
- （一般作the flux）archaic diarrhoea or dysentery〈古〉腹泻; 痢疾。
2
- continuous change不断变化, 波动：
the whole political system is in a state of flux.
整个政治体制飘忽不定。
3
- Physics the rate of flow of a fluid, radiant energy, or particles across a given area【物理】通量, 能流。
3.1
- the amount of radiation or particles incident on an area in a given time辐射（或粒子）通量。
3.2
- the total electric or magnetic field passing through a surface电通量; 磁通量。
4
- a substance mixed with a solid to lower its melting point, used especially in soldering and brazing metals or to promote vitrification in glass or ceramics（助）熔剂, 焊剂。
4.1
- a substance added to a furnace during metal smelting or glass-making which combines with impurities to form slag造渣。
词源
late Middle English: from Latin fluxus, from fluere 'to flow'.