但是埋地电缆也有相应的环境代价，它意味着清理出一条17m到40 m宽的通道，而这并非在所有地形条件下都能做到。
But sinking wires, which means clearing a corridor 17m to 40m wide and cannot be done in all terrains, carries an environmental toll too.
但是埋地电缆也有相应的环境代价，它意味着清理出一条17m到40 m宽的通道，而这并非在所有地形条件下都能做到。
But sinking wires, which means clearing a corridor 17m to 40m wide and cannot be done in all terrains, carries an environmental toll too.
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