At very low frequencies, the contribution from the vector potential to the impedance matrix is much smaller than the contribution from the scalar potential.
当频率很低时，阻抗矩阵中矢量磁位的贡献比标量电位的贡献小得多。
A scalar can be subtracted from a matrix of any size.
一个标量，可以被添加到任何大小的矩阵。
A scalar can be subtracted from a matrix of any size.
一个标量，可以被添加到任何大小的矩阵。
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