Study on the Comparison of Hydro-chemical Characters of Karst Spring for Different Elevations in Sub-mountain Area-A Case Study on Bitan and Shuifang Springs of Jinfo Mt. In Chongqing是什么意思_Study on the Comparison of Hydro-chemical Characters of Karst Spring for Different Elevations in Sub-mountain Area-A Case Study on Bitan and Shuifang Springs of Jinfo Mt. In Chongqing在线翻译_英语_读音_用法_例句