The wind set up a humming in the wires.
风使电线发出嗡嗡声。
It flew with the speed of the wind and gave forth a melodious sound a humming noise?
它以风速飞行，发出了音调优美的声音(交流声？)
I've seen once-shuttered factories humming with new workers who are building solar panels and wind turbines; rolling up their sleeves to help America win the race for the clean energy economy.
一些曾经关闭的工厂又有了新工人，开始忙碌着生产太阳能面板和风电涡轮机了，他们卷起袖子努力工作来帮助美国赢得清洁能源经济的竞赛。
I've seen once-shuttered factories humming with new workers who are building solar panels and wind turbines; rolling up their sleeves to help America win the race for the clean energy economy.
一些曾经关闭的工厂又有了新工人，开始忙碌着生产太阳能面板和风电涡轮机了，他们卷起袖子努力工作来帮助美国赢得清洁能源经济的竞赛。
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