the hydrosphere [ S ]水圈（地球表面上或附近的所有的水、冰、水蒸气的总和，如海洋、冰川、云层以及地上或地下水） all of the water, ice, and water vapor at or near the surface of the earth, such as the seas, clouds, and the water in and under the ground
The hydrosphere covers most of the surface of the earth as seas.
Oceans are a principal component of the hydrosphere.
See also: asthenospherethe atmospherebiosphereexosphereionospherelithospheremesospherestratospherethermospheretroposphere