If it were windy in Spain but not in Ireland, current would flow in one direction. On a blustery day in the Emerald Isle it would flow in the other.

• 如果西班牙刮着风而爱尔兰风平浪静，产生的电能可以通过某一条输电线传输，在绿宝石岛多风时，则可以利用另一条输电线。