And that  all still equals the charge inside the Gaussian surface divided by the permittivity of free space.

而这一切仍然等高斯表面内荷除由空间常数。

We also know the Coulomb constant equals the  inverse of the quantity four pi times the permittivity of free space.

我们还知道库仑常数等四圆周率由空间常数倒数。

And that is equal to the change in electric flux over time, multiplied by the permittivity of free space constant.

这等通量随时间变化由空间常数常数。

You can take our energy density equation and substitute the magnetic field magnitude, B, with the electric field, times the square root of the permittivity constants.

您可使用我们能量密度方程，并用场和常数平方根时间替换磁场大小 B。

This equation simplifies down to an equation with two constants, the permittivity of free space for electric fields, epsilon naught, and the permittivity of free space for magnetic fields, mu naught.

该方程简化了具有两个常数方程，场由空间常数 epsilon 为零，磁场由空间常数 mu。

The electric flux which passes through a sphere which is  concentric to a positive point charge equals the charge of the positive point charge  divided by the permittivity of free space.

穿过与正点荷同心球体通量等正点荷荷除由空间常数。

I won't blame you if you don't remember, but the permittivity of free space is a constant of proportionally we've used before, that relates electric charge to the physical effect of electric fields.

如果你不提我不会怪你，但由空间常数是我们之前使用相对论常数，它将荷与场物理效应联系起来。

Mathematically, this equation says that electric flux is the integral of the electric field over the area of the surface, which is equal to the enclosed charge, divided by the permittivity of free space.

在数学上，这个方程表明通量是表面积上场一个组成部分，它等闭合荷除由空间常数。

And we get that the magnitude of the electric  field which surrounds and is caused by an infinitely large, thin plane of charges  equals surface charge density divided by the quantity two times permittivity of free space.

我们发现，由无限大而薄荷平面包围并引起场强度等表面荷密度除由空间常数两倍。

One way to express capacitance is to divide the area of each plate by the distance between them, and multiply that by a constant – known as the permittivity of free space – denoted by epsilon naught.

表示容一种方法是将每个极板面积除它们之间距离， 这一个常数，称为可用空间容差，由 epsilon 注释推断。