名词
中文翻译：主干电路
同义词：
['main trunk', 'mainline', 'trunk line']
例句：
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1.The trunk circuit is essential for the operation of the power system.
主干电路对于电力系统的运行至关重要。
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2. The engineers designed a new trunk circuit to improve communication between the two countries.
工程师们设计了一条新的主干电路以改善两国之间的通信。
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3.The trunk circuit was damaged during the storm, causing a temporary power outage.
暴风雨期间损坏了主干电路，导致临时停电。