water accessible surface

基本解释

This (discovery) provides places where there is water accessible to the surface.
目前的发现只是给出了可能有水到达火星表面的地点。
By volume, only 3 percent of all water on earth is fresh water, and only about 1 percent is easily accessible surface fresh water.
依重量来看，只有3%在地球的水是新鲜水，只有差不多1%是趋近于表面新鲜水。
Water is everywhere—there are 332, 500, 000 cubic miles of it on the earth’s surface. But less than 1 percent of it is fresh and accessible, even when you include bottled water.
水无处不在——地球表面有332,000,000立方英里水。