单词	ravine
释义	ravineravine /rəˈvin/ noun [countable] Etymology ETYMOLOGYravine Origin: 1400-1500 Old French violent rushing, ravine, from Latin rapina; ➔ RAPINE earth science, geography a narrow valley with steep sides, formed by running water SYN gorge
随便看	main main clause main course main drag Maine mainframe mainland mainline mainly mainmast mainsail main sequence mainspring mainstay mainstream mainstreaming Main Street maintain maintenance maintenance fee maize Maj. majestic majestically majesty

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