The density, mass, and size compare favorably to that of Earth. But, the atmosphere and surface features differ markedly.

它密度、质量和大小都和地球差不多，但大气和表面却截然不同。

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The variation of the mass loss, packing density, surface area, distribution of pore diameter, amount of ash with the cyclical Numbers were researched.

考察了活性炭的失重率、堆密度、比表面、孔径分布及灰分含量随活化次数的增加而变化的情况。

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This difference in surface gravity is due to a number of factors - mass, density, and radius being the foremost.

地表重力的差异源于很多因素的影响——质量，密度，半径(这是最重要的因素)。

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To compare alien planets, Dr. Mendez at the Planetary Habitability Laboratory and his colleagues are creating an Earth Similarity Index that ranks worlds by their resemblance to our own planet, on a scale from zero to one, based on their mass, radius, density and surface temperature.

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