Though it would have to be cooled by liquid hydrogen or helium (which could make refrigeration up to seven times more expensive), it already looks like ir could significantly reduce the cost of future superconducting power cables.

• 这种超导电缆必须用液氢或液氦来冷却(这可能会使冷却步骤的费用增加7倍)，尽管如此，它似乎仍然能够大幅降低未来超导电缆的成本。