The current source in the supermesh provides the constraint equation necessary to solve for the mesh currents. 这里的necessary to solve for the mesh currents是做什么成分呢
The current source in the supermesh provides the constraint equation necessary to solve for the mesh currents的中文翻译为:超级网格中的电流源提供了求解网格电流所需的约束方程 current source的意思是:电源 constraint equation的意思是:约束方程式