世間萬物的存在，必定有其存在的價值和意義，每一個事物的產生必定有其產生的根源，并非憑空而降。

Fluorine 氟化鈣

得名于螢石(拉丁語Fluor，原意是熔劑)，化學成分是氟化鈣。

關于氟的命名，1810年的過化學家戴維與安培就曾建議用希臘單詞“Fluo”表示這個未知元素，因為"fluo"在希臘文中有“動”的含義，含氟礦物稱為螢石。遠古時代，人們在金屬冶煉過程中就知道用螢石做熔劑，螢石和礦石在一起加熱，就會使雜志生成流動性的礦渣而與金屬分離，因此將其稱為fluores，就是拉丁語“流動之意。

1813, non-metallic element, coined by English chemist Sir Humphry Davy (1778-1829) from fluorspar ("calcium fluoride," modern fluorite), the name of the mineral where it was first found, from L. fluor, originally meaning "a flowing, flow" (see fluent). The mineral name was given by Georg Agricola in 1546, translating German name flusse, so called because it melts easily.

詞根flu-

Flux

flux denotes generally ‘flowing’, and comes from Latin fluxus, a derivative of the past participle of fluere ‘flow’. this verb, similar in form and meaning to English flow but in fact unrelated to it, is responsible for a very wide range of English words: its past participle has given us fluctuate, its present participle fluent and a spectrum of derived forms, such as affluent, effluent, and influence, and other descendants include fluid (literally‘flowing’, from Latin fluidus), mellifluous (literally ‘flowing with honey’), superfluous, and fluvial (from Latin fluvius ‘river’, a derivative of fluere). Latin fluxus also produced the card-playing term flush.

affluent 富裕的，富足的

effluent 發出的，流出的；工業排放的廢水

fluctuate 漲動，起伏

fluent 熟練地，流暢的

fluid 流體的；易變的

influence 影響；權力

mellifluous 聲音甜美的，悅耳的

superfluous 過多的，過剩的

flue 煙道