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Carrier current systems use the power line mains to transfer information between remote locations.
电力线载波通信系统利用电力线来实现远程数据传送。
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Power line were down, water mains have been damaged.
电力系统瘫痪，水管被破坏。
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Power line were down, water mains have been damaged.
电力系统瘫痪，水管被破坏。
youdao