The current only flows at a particular voltage, and if that voltage is increased or decreased, it turns off again, making the switch reversible.
(The current; only flows; at a particular voltage) (that voltage; is increased; ) (that voltage; decreased; ) (it; turns off; T:again) (it; making; the switch reversible)
The current that voltage that voltage it it
only flows is increased decreased turns off making
at a particular voltage
T:again
the switch reversible