Many are often hidden energy to separate, such as the one above of lightning pierced the sky, without a flashlight, It cathode, anode to separate the two forms of existence.

• 许多能量常常被隐蔽地分离开来，如上面的一道划破长空的闪电，在没有发出亮光之前，它以正极、极分开的两种形式存在着。