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	thorax Thoreau, Henry David thorn thorniness thorny thorough thoroughbred thoroughfare thoroughgoing thoroughly thoroughness Thorpe, Jim those thou though thought thoughtful thoughtfully thoughtfulness thoughtless thoughtlessly thoughtlessness thought-out thought-provoking thousand

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