Hexo 的 Next 主题中渲染 MathJax 数学公式

$$\begin{eqnarray} \nabla\cdot\vec{E} &=& \frac{\rho}{\epsilon_0} \\ \nabla\cdot\vec{B} &=& 0 \\ \nabla\times\vec{E} &=& -\frac{\partial B}{\partial t} \\ \nabla\times\vec{B} &=& \mu_0\left(\vec{J}+\epsilon_0\frac{\partial E}{\partial t} \right) \end{eqnarray}$$

这里贴一些常用的备注

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