输电效率是线路末端有功功率P2与线路首端输送功率P1之比。
发电与输电分开经营，打开大门欢迎新成员入驻电力产业，都能提高效率并降低成本。
Separating generation from transmission and opening the door to new entrants would raise efficiency and reduce costs.
智能电网用效率更高、成本更低的传输方法——长距离地将电能传输到地方输电线、家庭和企业的终端用户。
Smart grid describes a more efficient, less costly method of moving electricity along long-distance transmission lines to local power lines and end-users in homes and businesses.
对于四节点输电系统，本论文研究发现，降低市场集中程度将降低市场效率(即使成本不受影响)。
For the four-knots power transfer system, it is found by the paper that decreasing market concentration degree will reduce market efficiency (although the cost will not be influenced).
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