July 2008 — Last Wednesday, American superconductor officially commissioned the world's first high-temperature superconductor power-transmission cable system to be used in a commercial power grid.
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相比同样粗细的铜导线，他们的输电能力高达150倍，但因为技术困难，超导体输电的商业应用发展缓慢。
They conduct 150 times the electricity of similarly sized copper wires. However, because of technological difficulties, the commercial development of superconductor power-cable systems has been slow.
American superconductor CEO Greg Yurek says that in the long run, the cost of superconductor transmission cables will be below that of adding new aboveground copper power lines.
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