其中，速度表示星系后退的速度，H0为哈勃常数，也即宇宙膨胀速率的参数，而距离指的是星系与相比较星系之间的距离。

H0 is the Hubble constant, or parameter that indicates the rate at which the universe is expanding; and distance is the galaxy's distance from the one with which it's being compared.

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但是灭绝的速度同一个恒定的常数有着相当大的距离。

But the rate of extinction is far from constant.

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在一般情况下，库仑定律是电荷的产物，和q2之间的距离就是半径r，q1q2，divided，by，their，separation，，which，is，r。,为了使最后算出的合理的静电单位和力学单位,我们需要在这儿引入一个常数。

So, in the most general form, Coulomb's law is the product of the charge, q1 And, in order to rationalize electrostatic units with mechanical units, we have to put a factor in here.

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