hard-and-fast

a.(规则等)不可改变的

harbor, harbour, harbour (US harbor), harbour-master, harbourage (US harborage), hard, hard cash, hard copy, hard core, hard court, hard cover, hard currency, hard disk, hard drug, hard labour, hard of hearing, hard porn, hard sauce, hard shoulder, hard water, hard-bitten, hard-boiled, hard-headed, hard-hearted, hard-hitting, hard-line, hard-liner, hard-nosed, hard-pressed, hard-top, hard-wearing, hard-working, hardback, hardbitten, hardboard, harden, hardened, hardheaded, hardiness, hardly,