federation

n.联邦制

feather-bed, feather-brained, featherweight, feathery, feature, featureless, Feb, febrile, February, fecal, feces, feckless, fecklessly, fecklessness, fecund, fecundity, Fed, fed up, federal, federate, fee, feeble, feeble-minded, feebleness, feebly, feed, feed in, feed on, feed up, feed with, feedback, feedbag, feeder, feeding-bottle, feel, feel about, feel amused at, feel bitter at, feel envy at, feel guilty about,