All of this extra water that's being boiled requires energy, and it's been calculated that in one day of extra energy use from boiling kettles is enough to light all of the streetlights in England for a night.
煮开这部分多余的水 需要能源，而且据计算 在一天内这些烧水壶所消耗的 额外能量 就足以让英国所有的路灯 照亮一夜。