Yet our water is all the water Earth has ever had.

但我们现在还不知道地球上到底有多少水。

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What if there was no water on Earth?

如果地球上没有水怎么办？

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It is called the bright-young-Sun solution, according to which the Sun would have provided enough heat for the water on Earth and Mars to be liquid.

它被称为“明亮的早期的太阳解决方案”，根据该方案，太阳将提供足够的热量，使地球和火星上的水变成液体。

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Scientists have long believed that Earth's satellite lacks the ability to hold water near its surface because it has no atmosphere.

VOA: special.2009.09.30

The earth was a divinity, the sky was a divinity, the water was a divinity, had divine power.

土地是神，天空是神，水是神，都有超凡的力量。

耶鲁公开课 - 旧约导论课程节选

and getting back to balancing the elements in our lives, very basically like Earth, water, fire.

回归生命中元素的平衡，基本上就是土、水、火。

瑜伽的魅力 - SpeakingMax英语口语达人

Answer: B -- Only 2.5% of water on Earth is fresh water.

CNN: Hey Earthling, it's Earth Day; time for a quiz

These are the colors of nature, he elaborates, symbolizing the sun, trees, water and earth.

FORBES: Magazine Article

The natural elements such as wind, water, earth, and fire have been inspirations to composers throughout time.

NPR: Yolanda Kondonassis: Impressions Of The Harp