名词
中文翻译：主电源
同义词：
['main switch', 'main breaker例句：1. The power company must ensure that the force main is working properly to prevent blackouts during peak demand periods.（电力公司必须确保主电源正常工作，以防在高峰需求期间发生停电。）']
例句：
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1. The power company must ensure that the force main is working properly to prevent blackouts during peak demand periods.
电力公司必须确保主电源正常工作，以防在高峰需求期间发生停电。
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2.During a power outage, it's essential to have a backup force main in case the primary one fails.
在电力中断时，有必要有一个备用的主电源以防主要电源失败。
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3.The engineer quickly identified the fault and replaced the damaged force main, restoring power to the affected area.
工程师迅速诊断出故障并更换了损坏的主电源，恢复了受影响区域的电力。