Lighting accounts for about 7% of the total electricity consumed in the US. Since lighting is often far removed from the power source—such as the distance from a power plant to street lamps on a remote highway—a lot of energy is lost during transmission.

在美国，照明约占总耗电量的7%。由于照明通常远离电源——例如从发电厂到偏远公路上的路灯——因此大量的能源在传输过程中会损失掉。

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There was a severe limitation to the extent of music preservation as well as to the distance and directions of music transmission.

音乐保存极为有限，传播距离和传播方向也极为有限。

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The difficulty is most acute for long-distance transmission, but shows up at times even over distances of a few hundred miles.

这一困难对于长距离传输最为严重，不过，即便传输距离只有几百英里，有时也会出问题。

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That is the reason why the current emphasis in China is on the construction of 500kv extra-high-voltage lines and long-distance power transmission.

FORBES: Cracking China's Power Sector

At 400 kilovolts, a standard value for long-distance transmission, an alternating current 30 metres (100 feet) from the ground has a fortieth of the loss of a similar cable at ground level.

ECONOMIST: Power transmission