单词

ruthless rust rural rupture rumour rule of thumb ruinous ruffle rub routine rouse rough rotate rot role ritual roar roam robust rivet roast rival rise to the occasion rip riot rim rigorous rigid retort ripple righteous restless restrain retain retail reticent resume restore respiration resource resort to responsive resort resonant resolution resilience resignation resign reservoir rig ridiculous ridge ribbon revolt revenue revenge retrospect retrieve retreat rhetorical question rhythm reward revolve rhetoric revise reverse review reverent reserve revelation resent resemble resemblance rescue request reputation reptile reproach represent repetition repertoire repent repel repatriate renowned renaissance renovation rendezvous remorse remnant remittance remind remedy remarkable rely reluctant relinquish relief reliable relevant relentless release relay relapse rejoice reinforce reimburse reign rehabilitate regulate register registrar regeneration regardless regarding refusal refund refugee refreshing refrain from refreshment refrain refine referendum reference reel redundant redeem recycle rectify rectangle recruit recover reconcile recommendation reclaim recline reckon reckon with sb reckless recite recital reciprocal recipe recipient recession reception receipt recede recall reassure reasonable rear reap realm readily raw rave ravage rational ratio rarely range random rampant ramble rally rail raid