fragility

n.脆弱

fox, fox-hunting, fox-terrier, foxglove, foxhole, foxhound, foxtrot, foxy, foyer, FPA, Fr, fracas, fraction, fractional, fractionally, fractious, fractiously, fractiousness, fracture, fragile, fragment, fragmentary, fragmentation, fragrance, fragrant, fragrantly, frail, frailty, frame, frame-house, frame-up, framed, framework, framing, franc, France, franchise, Francis Bacon, Franciscan, Franco-,