Liquid water has been present on Earth for 4.4 billion years.

液态水在地球上存在了44亿年。

" Every one of them could have liquid water."

“它们中的每一个都可能有液态水。”

The difficult bit is having liquid water.

困难的是要有液态水。

Meaning, liquid water can potentially exist on their surfaces.

这意味着液态水可能存在于它们的表面。

A planet about this temperature could have liquid water on its surface.

这个温度的行星表面可能有液态水。

Anywhere that there is liquid water there is a possibility of life.

任何有液态水的地方都有存在生命的可能性。

That's the temperate region where a planet could accommodate liquid water.

适居带属于温带地区，那里可以容纳液态水。

If Martians exist, even the microbial sort, they probably need liquid water.

如果火星人真的存在，即便是火星上的微生物也需要液态水。

There had to be liquid water the crucial ingredient for life on Europa.

木卫二上曾经存在生命的关键元素，也就是水。

Our planet was able to hold on to its atmosphere and liquid water.

我们的星球能够留住大气层和液态水。

And where there's liquid water, they say, there could be life.

而有液态水的地方就可能存在生命。

" The availability of liquid water is the first step to habitability, " Daswani said.

" 液态水的供应是实现可居住性的第一步。"

Within minutes, droplets of liquid water formed, even at minus 100 degrees Fahrenheit.

即便室温只有零下100华摄氏度，几分钟之内，液态水还是形成了。

Or just right, the kind of place that could have liquid water?

或者刚好，是个有液态水存在的地方？

Earth now had a stable climate, an atmosphere and liquid water.

地球现在有了稳定的气候、大气和液态水。

Without the pressure of an atmosphere, liquid water can't survive.

没有大气层的气压，液态水也难以“生存”。

The Goldilocks zone or the habitable zone has the right temperature for liquid water.

宜居区或适居区的温度适合保存液态水。

For a planet to have liquid water at its surface, three things are important.

行星若要有液态水存在于其表面， 有三件事是很重要的。

This area is neither too hot nor too cold for liquid water to exist.

这个区域既不太热也不太冷，适合液态水存在。

A distance that's not too close or too far to have liquid water.

它指的是一个能让行星上存在液态水的适宜距离。