1. 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。
2. Glaciers are part of Earth's hydrologic cycle and are second only to the oceans in the total amount of water contained. 冰川是地球水循环的一部分，其含水量仅次于海洋。
3. To undertake works on hydrologic management. 负责水文管理工作。
4. Established the hydrologic forecasting model of the basin. 流域水文预报模型的建立。
5. 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。
