Moreover, the Moon's composition, though similar to that of Earth's mantle, is not a precise match.

此外，月球的成分虽然与地球的地幔相似，但并不完全吻合。

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The Moon's mean density is much lower than that of Earth but is about the same as that of Earth's mantle.

月球的平均密度比地球低得多，但与地球的地幔密度大致相同。

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In a titanic collision model, the bulk of the Moon would have formed from a combination of material from the impactor and Earth's mantle.

在泰坦尼克碰撞模型中，月球的大部分是由来自撞击者和地幔的物质结合形成的。

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Earth's mantle, for comparison, holds roughly 50 to 300 ppm water, researchers said.

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Deep underneath your feet is a hellish stone soup, kept hot by a torrent of radiation from poisonous isotopes of uranium, thorium and potassium in the earth's superheated mantle.

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The rock is peridotite, which is one of the main rocks in the upper mantle, an area that provides a girth below the Earth's crust.

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