据科学家推测，土卫二冰冷的表面99%被水冰覆盖，地表之下存在液态水的几率也很大。
The surface of the icy moon is thought to be about 99 percent water ice, with a good chance of liquid water beneath.
从道路或街道排除表面水被称为地表排水。
Removal of surface water from the road or street is known as surface drainage.
表面水——河流，湖波和水库中的新鲜水，贮藏以及流淌在地表。
Surface water----The fresh water in rivers, lakes, and reservoirs that collects and flows on the earth's surface.
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