To intensify basic external insulation level of power system-fundamental way for prevention of large-scale pollution flashover.

防止大面积污闪的根本出路是提高电网的基本外绝缘水平。

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"Noise pollution is so ubiquitous that it may be a factor in some large-scale declines in biodiversity, " says Dr Barber.

BBC: Earth News - Noise pollution threatens animals