单词	Petra
释义	PetraPet‧ra /ˈpetrə/ an ancient city in Jordan, where buildings are cut into pink-coloured rock. It is sometimes called ‘the rose-red city, half as old as time’, and is visited by many tourists.
随便看	rube Rube Goldberg rubella Rubens, Peter Paul Rubicon rubicund Rubik's Cube ruble rubric ruby Ruby, Jack RUC ruched ruck rucksack ruckus ructions rudder rudderless ruddiness ruddy rude rudely rudeness rudimentary

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