n. 
羊膜
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four-moulter,
fournisseur,
four-o'clock,
four-part,
fourpence,
fourpenny,
fourplex,
fourply,
four-point,
four-poster,
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proadifen,
proagglutinoid,
proala,
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pro-am,
proamnion,
pro-and-con,
proandry,
proangiosperm,
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four-stage,
four-star,
four-start,
four-stroke,
four-tape,
fourteen,
fourteener,
fourteenth,
four-tensor,
fourth,
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proadifen,
proagglutinoid,
proala,
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pro-am,
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pro-and-con,
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four-way,
four-wheel,
four-wheeler,
fourwire,
FOV,
fovantini,
fovea,
fovea centralis,
foveal vision,
foveate,
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proadifen,
proagglutinoid,
proala,
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proamnion,
pro-and-con,
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fowlerite,
fowlery,
fowling,
fowlpox,
fowl-run,
fox,
fox terrier,
foxalin,
foxbane,
Foxbase,
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proadifen,
proagglutinoid,
proala,
proalbumin,
pro-am,
proamnion,
pro-and-con,
proandry,
proangiosperm,
proangiotensin,
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foxes,
foxfire,
foxglove,
foxhole,
fox-hole,
foxhound,
fox-hound,
foxhunt,
fox-hunt,
foxhunter,
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proadifen,
proagglutinoid,
proala,
proalbumin,
pro-am,
proamnion,
pro-and-con,
proandry,
proangiosperm,
proangiotensin,
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fox-terrier,
foxtrel,
foxtrot,
fox-trot,
foxy,
foy,
foyaite,
foyer,
foziness,
fozy,
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proadifen,
proagglutinoid,
proala,
proalbumin,
pro-am,
proamnion,
pro-and-con,
proandry,
proangiosperm,
proangiotensin,
n. 
羊膜
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FPIA,
FPL,
FPLA,
FPM,
FPMH,
FPO,
FPP,
FPR,
FPRI,
fprintf,
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proadifen,
proagglutinoid,
proala,
proalbumin,
pro-am,
proamnion,
pro-and-con,
proandry,
proangiosperm,
proangiotensin,
n. 
羊膜
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fr,
FRA,
FRAC,
fracas,
frac-monitor,
frac-string,
fractal,
fractality,
fractals,
fractate,
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proadifen,
proagglutinoid,
proala,
proalbumin,
pro-am,
proamnion,
pro-and-con,
proandry,
proangiosperm,
proangiotensin,
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fractional-octave,
fractionalsampling,
fractional-slot,
fractionary,
fractionate,
fractionating,
fractionation,
fractionator,
fractionize,
fractionlet,
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proadifen,
proagglutinoid,
proala,
proalbumin,
pro-am,
proamnion,
pro-and-con,
proandry,
proangiosperm,
proangiotensin,