But to unlock that future, we need to build far more high voltage transmission lines and update the entire energy grid.

但是为了开启未来，我们需要建造更多的高压输电线路，并更新整个电网。

That's the job of high voltage transmission  lines.

这就是高压输电线路的工作。

Then they have a transformer at the power plant that steps up the voltage for high voltage transmission.

然后他们在发电厂有一个变压器，可以提高高压传输的电压。