5 percent of the world's power comes from the wind.
世界上5%的能源来自风能。
Wind power may be free, goes an industry adage, but it is far from cheap.
正如这个行业的谚语所说，风可以是免费的，又是非常昂贵的。
Sails are not the only way of collecting power from the wind, though.
不过，帆并不是风力发电的唯一途径。
Power can be fed from wind generators into the electricity grid system.
电力可以从风力发电机流入输电网。
Power grid is weak in 3N areas, wind power is far away from load center.
风资源丰富的“三北地区”电网相对薄弱，风电远离负荷中心。
Power grid is weak in 3N areas, wind power is far away from load center.
风资源丰富的“三北地区”电网相对薄弱，风电远离负荷中心。
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