Afuse interrupts excessive current (blows) so that further damage by overheating or fire is prevented.
保险丝中断过大(打击)电流，防止由过热或火灾造成的进一步损害。
2
If James was confounded, seemingly dribbling in the dark, that's what happens when afuseblows in the middle of a storm and there are no candles to light up your life.