数据显示月球水比地球水包含更多的重氢元素，并与海尔·波普彗星、百武彗星及哈雷彗星更为接近。

They found deuterium at higher levels than it's found in Earth water-but at levels similar to the comets Hale-Bopp, Hyakutake and Halley.

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水覆盖了地球表面的大部分。

Water covers a large proportion of the earth's surface.

《牛津词典》

我们地球表面的70%是水。

70% of our globe's surface is water.

《柯林斯英汉双解大词典》