You can use a panel of solar cells to create the current directly, by liberating electrons from a semiconducting material such as silicon.

你可以使用一块太阳能电池板从硅等半导体材料中释放电子来直接制造电流。

By changing the electrical charge of the gate, the conductivity of the semiconducting material can be manipulated, allowing current to flow or be stopped – like the water faucet analogy we discussed earlier.

通过改变" 门" 的电荷，我们可以控制半导体的导电性，允许电流流动或停止——就像前面提到的水龙头比喻。