However, more recent data imply that at least some parts of the planet did in fact experience long periods in the past during which liquid water existed on the surface.

然而，更新的数据表明，至少在该星球表面的一些部分的确存在过液态水，且存在于过去很长的一段时间内。

youdao

Some scientists are examining the potential for harvesting icebergs from Antarctica, which is estimated to have the biggest reserves of fresh water on the planet.

一些科学家正在研究从南极洲收集冰山的可能性。据估计，南极洲拥有地球上最大的淡水储备。

youdao

While 75% of our planet is covered with water, only about 2% is fresh water that comes from rivers, lakes, ice and snow.

虽然地球的75%被水覆盖，但只有大约2%是来自河流、湖泊、冰雪的淡水。

youdao

His theory was that Martians were trying to bring water to the warm areas near the equator of the planet.

VOA: special.2010.07.11

If a large body of water once existed on the red planet, the remainder of the water must now either be stored below the surface and in the much smaller south polar cap, or have been lost to space.

BBC: By BBC News Online Science Editor Dr David Whitehouse

This has enabled scientists to estimate the volume of water in the ice cap and speculate that much of the planet's original water is either hidden below the surface or missing.

BBC: By BBC News Online Science Editor Dr David Whitehouse

Furthermore, it is all the more urgent to take action in this domain because 50% of the biodiversity and fresh water of the planet is concentrated in this region of the world.

UNESCO: Social and Human Sciences