water r cycle水循环
hot water cleanup cycle热洗周期
soft water closed cycle软水闭路循环
water natural cycle水自然循环
water-cycle水循环
water-cycle model水循环模式
water zoology cycle水生态循环
water hydrologic cycle水文循环
water vapor cycle水汽收支
On the other hand,the impact of human activities on water cycle and water resources is also an important reason.
递减原因除降水量减少因素外,人类活动对水循环及水资源影响也是一个重要原因。
参考来源 - 淮河流域蒸发皿蒸发量变化分析The wetland degradation reason is supposed by analyzing the change trend of the region climate and water cycle factors.
本研究通过分析气象因子与水循环要素变化趋势，解释了湿地退化的原因。
参考来源 - 扎龙湿地生态水文结构分析与生态需水计算The rainfall plays a very important role in the water cycle Only when the rainfall is greater than 10mm.
但是<5mm的降雨量基本不能被沙区植被所利用,只有当降雨量大于10mm时,才能在沙地近地表水分循环中起到非常重要的作用。
参考来源 - 节水灌溉工程节水量计算方法的研究In this paper, which is supported by the preliminary designing of methanol equipment(200,000t/a) in Weihe River Coal Chemical Industry Group Co. , Ltd and the actual operation data, the water cycle of Methanol Synthesis system was studied.
本文依托陕西某化肥厂年产20万t/a甲醇初步设计,以陕西某化肥厂实际操作数据为基础,对合成甲醇系统中的水体循环进行了一定的研究。
参考来源 - 煤基大甲醇系统水循环行为研究N（名词） the circulation of the earth's water, in which water evaporates from the sea into the atmosphere, where it condenses and falls as rain or snow, returning to the sea by rivers or returning to the atmosphere by evapotranspiration 水文循环 (Also called hydrologic cycle)