汉译英，尽量简洁，80词以内，不要软件逐词翻译那种生硬的，尽量流畅一些！

地球上的水，百分之九十七是海洋水，而人类所需的淡水资源仅占全球水量的2.5%。
The water on the earth is sea water, 97 percent, while human need of freshwater resources per cent of global water of 2.5%.

地球上的淡水资源，绝大部分为两极和高山的冰川，其余大部分为深层地下水。
On earth, majority of freshwater resources for poles and alpine glaciers, most of the rest goes deep groundwater.

目前，人类利用的淡水资源，主要是江河湖泊水和浅层地下水，仅占全球淡水资源的0.3%
At present, human beings use of freshwater resources, mainly rivers and lakes water and groundwater, per cent of global freshwater resources of 0.3%

97% of the water on earth is from sea. Freshwater needed by human takes only 2.5% of all water, most of which is from the two poles and the glaciers on the mountains and the rest is mostly deep underground. Now water human are exploiting is mainly from rivers, lakes and phreatic water, which only owns 0.3% of all freshwater on earth.

The water on the earth is sea water, 97 percent, while human need of freshwater resources per cent of global water of 2.5%. On earth, majority of freshwater resources for poles and alpine glaciers, most of the rest goes deep groundwater. At present, human beings use of freshwater resources, mainly rivers and lakes water and groundwater, per cent of global freshwater resources of 0.3%

The water on the earth is sea water, 97 percent, while human need of freshwater resources per cent of global water of 2.5%. On earth, majority of freshwater resources for poles and alpine glaciers, most of the rest goes deep groundwater. At present, human beings use of freshwater resources, mainly rivers and lakes water and groundwater, per cent of global freshwater resources of 0.3%
我最擅长翻译了 (*^__^*) 嘻嘻……

The ninth-seven pecent of global water is ocean water while the two point five precent is the freshwater resources that available to human being. Almost entirely of freshwater resources comes from north/south plotes and mountain glaciers and the rest comes from deep underground.Presently,the freshwater we can used is mainly from lake,river and shallow underground,which only takes 0.3%of global freshwater resources.