急救，ru开头的单词

run，ruby，rush，runny，rubbing，rule，ruin

rude，rudimentary，rumble，rung，rumor

runtime，rubbish，rump，ruddy，Russians

rundown，rugged，rubble，rune，rustproof

rubberize，runaround，rustle，rumbling

runoff，rudely，ruminant，ruggedness，runs

rucksacks，rulebook