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hydrologic cycle
desert.	水循环; 水分循环
eng.geol.	水文循环〔周期〕
environ.	水分〔水量〕平衡〔循环〕
hydroel.st.	水文循环
tech.	水文彳盾环; 水文周期
water.res.	水循环过程
hydrologic cycle The movement of water between the oceans, ground surface and atmosphere by evaporation, precipitation and the activity of living organisms, as one of the mayor biogeochemical cycles. Each day water evaporates from the oceans and is carried in the air from the sea over the land, which receives it as precipitation, and finally returns from the land to the sea through rivers, thus completing the cycle
environ.	水文循环 (通过蒸发、降水以及生物活动使海洋、地表和大气中的水分转移，这是主要的生物地化循环之一。每天水分从海上蒸发进入空气，飘至陆地上空降落为雨，最终通过江河再汇回海洋，就这样完成一个循环。)