The circulation of water through this system is described by the hydrologic cycle. 水在這個體系中的循環是用水循環來描述的。
Scientists now believe Titan has a hydrological cycle similar to Earth. 科學家們現在認為提坦的水循環和地球相似。
As we have already noted, the movement of water into the ground is part of the hydrologic cycle. 我們已經說過，水向地下運動是水文循環的一部分。
Many scenarios for global warming, for example, invoke a speedup in the hydrological cycle by which water evaporates and then comes down as rain. 例如，全球氣候變暖的許多現象引起了水文循環的加速，其形式是水分的蒸發上升，然後以雨的形式降落至地面。
