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	sleepwalking sleepwear sleepy sleepyhead sleet sleeve -sleeved sleeveless sleigh sleight of hand slender slenderness slept sleuth sleuthing slew slice sliced bread slicer slick slicker slickly slickness slide slide projector

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