ring
加入词篮ring
ring binder
ring up
ring-road
ringed
ringroad
rings
ringworm
rinse
Rio de Janeiro
riot
riot
riot gear
riot shield
rioter
riotous
rip
ripe
ripen
ripeness
ripple
rise
risen
riser
risible
rising
risk
risk
risk-taking
riskily
risky
risky
risus
ritual
rival
rival
rivalize
rivalless
rivalrous
rivalry
river
river bed
riverfront
riverside
rivulet
RNA
road
road sense
road sign
roadblock
roadhouse
roadhouse
roadside
roadway
roadworks
roar
roar
roast
rob
robber
robbery
robe
Robert
Robert Frost
robin
Robinson
robot
robotic
robotics
robust
rock
rock
rock and roll
rock climbing
rockabilly
rocker
rockery
rocket
rocking chair
rocking chair
rocky
rod
rode
rodent
roe
Roger
Roger Penrose
rogue
role
role-play
roll
roll over
roll-up
roller
roller coaster
roller skating
roller-skating
rolling
rolling mill
