∮lH⋅dι=∬SJ⋅dS+∬s∂t∂D⋅dS
∮lE⋅dι=−∬s∂t∂B⋅dS
∮sB⋅ds=0
∮sD⋅dS=∭VρdV
∇×H=J+θt∂D
∇×E=−θt∂B
∇⋅B=0
∇⋅D=ρ
$\oint_lH\cdot d\iota =\iint_S J\cdot dS+\iint_s \dfrac{\partial D}{\partial t}\cdot dS$
$\oint_lE\cdot d\iota =- \iint_s \dfrac{\partial B}{\partial t}\cdot dS$
$\oint_s B \cdot ds = 0$
$\oint_s D \cdot dS = \iiint_V \rho dV$
$\nabla \times H =J + \dfrac{\partial D}{\theta t}$
$\nabla \times E =- \dfrac{\partial B}{\theta t}$
$\nabla \cdot B = 0$
$\nabla \cdot D = \rho$
KeTeX实在太复杂了，有更简单的写法吗，求教
