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Phrases:

波幅  bō fú

amplitude

大幅  dà fú

a big margin, substantially

幅度  fú dù

width, extent

幅射  fú shè

radiation, radiate

幅員  fú yuán

a country's surface area, extent of a country

篇幅  piān fu5

(take up or devote) space, ink, time (in a printed page or news story), length (of a piece of writing)