In fact, we also have a light-controlled "off" switch, by installing this light-controlled "off" switch, we can also turn off a memory, any time, anywhere.
実は光制御「オフ」の スイッチもあり — そのスイッチを 設置する事で — 記憶をいつでも何処でも 消す事も可能だと 容易に想像されます