雅思基本词汇F篇参考

facade

facilitate

facility

faithfully

fallow

fascinating

fasten

fatal

fatigue

fauna

favorable

feasible

feature

federation

fertilizer

fiber

fierce

fitness

flame

flank

flaw

flexible

flora

fluctuate

fluently

focal

focus

forecast

formality

formula

formulate

forthcoming

fossil fuel

foundation

fragment

frame

freedom

freight

frequency

friction

frown upon

fume

function

fundamental