名词
中文翻译：主电源供应
同义词：
['main power supply', 'mains power supply例句：1. The new computer has a mains power supply that can last for hours.（这台新电脑有一个可以持续数小时的主电源供应。）']
例句：
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1. The new computer has a mains power supply that can last for hours.
这台新电脑有一个可以持续数小时的主电源供应。
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2. The building has a mains power supply that is connected to the national grid.
这座建筑有一个连接到国家电网的主电源供应。
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3. Mains power supplies are essential for modern homes and offices.
主电源供应对于现代家庭和办公室来说是必不可少的。