The purity must be high if it is to be used to carry electricity.

如果要用来导电，纯度必须高。

But this also requires costly power grids to carry the electricity to the distant cities.

但这一举措同时需要造价高昂的电网系统，使其将电力输送到远方的城市。

The wires in front and airfoils in the back both carry high electricity – up to 20,000 volts each.

前面的钢丝和后面的叶片剖面均带有高压，最高电压均为200伏。

These act like wires to carry electricity through the circuit.

这些就像电线一样通过电路传输电力。

The wires that carried electricity to these lights ran up the walls of the building.

为这些灯供电的电线沿着建筑物的墙壁延伸。

Long cables tie them to the ground and carry the electricity.

长电缆将它们连接到地面并传输电力。

Long cables under the sea carry the electricity to the land.

海底的长电缆将电力输送到陆地。