Its bottom electrode was just 5 millimeters (0.2 inch) on a side.

它的底部电极边长仅为 5 毫米（0. 2 英寸）。

You can think of the control wire as an input, and the wire coming from the bottom electrode as the output.

您可以将控制线视为输入，将来自底部电极的电线视为输出。