词根词缀：fluct-, flucti-, -flux, flu-, flum-, -fluent, -fluence

【来源及含义】Latin: flow, flowing; moving in a continuous and smooth way; wave, moving back and forth

【同源单词】activated-sludge process, affluence, affluent, affluents, afflux, affluxion

词根词缀：radio-, radi-, rad-

【来源及含义】Latin: ray, radiating [the Latin word for the spokes of a wheel is radius]; spoke, staff, rod

【同源单词】involuntary euthanasia, irradiance, irradiant, irradiate, radial, radian