water accessible surface

基本解释

This (discovery) provides places where there is water accessible to the surface.
目前的發現衹是給出了可能有水到達火星表麪的地點。
By volume, only 3 percent of all water on earth is fresh water, and only about 1 percent is easily accessible surface fresh water.
依重量來看，衹有3%在地球的水是新鮮水，衹有差不多1%是趨近於表麪新鮮水。
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.
水無処不在——地球表麪有332,000,000立方英裡水。