“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	emission factor emission factors emission flux emission frequency emission inventories Emission inventory of pollutants emission line emission-line galaxy emission-line nebula emission-line object emission-line star emission measure emission mechanism emission microscope emission nebula emission nebulosity emission of black hole emission operator emission performance standard for stationary source emission point emission probability emission process emission sources emission spectrographic analysis emission-spectroscopical

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。