+U 八 +U2i2+U3i+U4i1+D5i;+U61 55 Note that the conclusion cannot be interpreted as a conservation of power; it is merely a mathematical relationship that exists between the branch voltages of one circuit and the branch currents of another circuit with the same topology(拓扑)Note that the conclusion cannot be interpreted as a conservation of power; it is merely a mathematical relationship that exists between the branch voltages of one circuit and the branch currents of another circuit with the same topology(拓扑). ^ 6 i ^ 2 i ^ 1 i −1 + 5 + 6 ^ 3 i + 2 + 3 +4 ^ 4 i = 0 ^ 5 i + −  6 + 2 − + 4 − − +  1 − +  3 − +  5 6 i ^ 1 i ^ 5 i 4 ^ i ^ 2 i ^ 3 i ^