You know, I am still not too clear about the hydrologic cycle, the transfer of water back and forth between the earth and the atmosphere.
你知道,我仍然不是很清楚水文循环,也就是水在地球和大气之间的来回转移。
The hydrologic cycle is a useful starting point for the study of water supply.
水文循环是学习给水知识的有用的起点。
The circulation of water through this system is described by the hydrologic cycle.
水在这个体系中的循环是用水循环来描述的。
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