想象一下持续停电几小时。
其时，由于经常性的持续停电，尼日利亚的电力系统面临压力。
Nigeria's power system was under pressure with persistent and frequent blackouts the norm.
而萨那正处于间歇性停电，在过去的几周内，有时一次停电甚至会持续长达2天的时间。
Electricity in Sanaa has been sporadic, sometimes off for as long as two days at a time during the past few weeks.
在小一点的城镇和乡村地区，情况就更加糟糕。那里的停电常常持续12个小时以上。
And it is much worse in smaller towns and rural areas, where power blackouts can last for more than 12 hours a day.
电力公司收归国有造成电力短缺，今年初出现严格的限电措施，而且全国持续发生的不定期停电。
Electricity nationalisation contributed to power shortages that saw severe rationing earlier this year and continuing unscheduled blackouts across the country.
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.
带电测量金属氧化物避雷器持续电流具有停电测量无可比拟的优势，但周围带电设备对测量结果的影响是带电测量方式最大的缺点。
Measurement of metal oxide arrester (MOA) on line has a great advantage than off line, but its main defect is apt to be disturbed by running equipment all around.
停电持续了七分钟！
停电持续了七分钟！
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