check001 blogs.barrons.com/techtraderdaily/
回答: u01 U(1)规范作用 为了使动力学方程对第二类规范变换保持不变,必须相应地引入静止质量为零的规范场,称为电磁场
由 marketreflections
于 2011-08-30 18:15:31
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