岩石成畦状起伏的,顽固的,严重的
rock-ribbed adj 1: abounding in or bordered by rocky cliffs or scarps; "the rock-ribbed coast of Maine" [syn: {rockbound}] 2: tradition-bound and obstinately opinionated; "an inflexible (or die-hard) conservative"; "rock-ribbed republican" [syn: {die-hard(a)}]