Dig the ground over in the autumn.

【ground】秋天的时候把土翻过来。

That small matter of the Pyrenees  between Spain and France meant the two countries had to dig over  60km of tunnels - but the new interconnector doubled the amount  of electricity they can exchange.

西班牙和法国之间的比利牛斯山脉这个小问题意味着两国不得不挖掘超过 60 公里的隧道 - 但新的互连器使它们可以交换的电量增加了一倍。