AC has a very high voltage, and is lethal.

交流电电压很高 而且致命。

One of the most daring techniques is used on very high voltage tension lines.

最大胆的技术之一是用在非常高压的张力线上。

Imagine a tiny cube made of normal gas with a very high voltage across it.

想象一下，一个装有正常气体的小方块 被高电压贯穿。

So it's worth transmitting electricity at very high voltages.

因此，在 非常高的电压下传输电力是值得的。