In order to distinguish different compact objects, people easily bethink of the difference of mass-radius relations between them that may be caused by different equations of state (EOS).

为了将不同的致密星区分开来，人们最容易想到的是物质状态方程的不同可能导致这些致密天体质量-半径关系的差异。

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We discover that it is hard for us to distinguish different neutron star models by the simple constraints of masses, redshifts and rotations on mass-radius relations.

结果发现，质量、红移及旋转频率对相应状态方程质量-半径关系的简单限制很难区分不同的中子星模型。

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We can make some substitutions here using some of the derivation on the previous board which will give us the Planck constant divided by 2 pi mass of the electron times the Bohr radius.

在这里我们也可以,用我以前在黑板上写过的一些词来取代它,得到的是普朗克常数除以2π电子质量,再乘以波尔半径。

麻省理工公开课 - 固态化学导论课程节选

n So the velocity is given by this product of the quantum number n Planck constant 2 pi mass of the electron time the radius of the orbit, which itself is a function of n.

速度是量子数,普朗克常数2π乘以轨道半径的值,它自身也是n的函数。

麻省理工公开课 - 固态化学导论课程节选

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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Both were the subject of a massive manhunt in Watertown, Mass in the wee hours of Friday morning, where police sealed off a 20-block radius where the suspects were believed to be holed up and warned the public to stay indoors.

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