架空线路单位长度的停电数要比地下电缆的多，但停电持续时间短。
Overhead lines have more outages than underground cable per unit length, but the outages are usually shorter in duration.
架空线路单位长度的停电数要比地下电缆的多，但停电持续时间短。
Overhead lines have more outages than underground cable per unit length, but the outages are usually shorter in duration.
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