n. 

,涡流,倒退,逆流
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Fukuoka,
Fukushima,
Fukuyama,
Fula,
Fulani,
Fulbe,
Fulbright,
fulchronograph,
fulcin,
fulcra,
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backscratching,
backscrolling,
backseat,
backseat driver,
back-selling,
backset,
backsetting,
backshaft,
backshank,
backsheesh,