flux

n.流动，变迁

flunk, flunkey (also flunky), fluoresce, fluorescence, fluorescent, fluorescent lamp, fluoridate, fluoridation, fluoride, fluoridization, fluoridisation, fluoridize, fluridise, fluorine, flurry, flush, flushed, fluster, flute, flutist, flutter, fluvial, fly, fly into a temper, fly-away, fly-blown, fly-by, fly-by-night, fly-fish, fly-fishing, fly-half, fly-paper, fly-past, fly-spray, flycatcher, flyer, flying, flying buttress, flying colours, flying column, flying doctor, flying fish,