“natural bridge”的概念、定义、翻译、参考文献-科学参考

单词	natural bridge
释义	natural bridge Encyclopedia 工学风景名胜资源释 natural bridge天生桥地下河与溶洞的顶板崩塌后，由残留部分的两端与地面连接而中间悬空的桥状地形。
随便看	traction drive traction drive system traction electric apparatus traction electric network traction fibre traction lift traction motor traction of fracture traction power supply system of high speed maglev train traction power supply system of medium and low speed maglev train traction relief traction substation traction system traction transformer tractive chain conveyor tractive force tractive force of train Tract of the Quiet Way of the Thearch Lord Wenchang tractometer tractor tractor airscrew tractor and semi-trailer tractor feeder tractor skidding tractory

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