名词
中文翻译：操作磁铁
同义词：
['operating coil', 'operating core']
例句：
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1.The operating magnets in the machine are responsible for moving the parts.
机器中的操作磁铁负责移动部件。
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2. The magnets in the refrigerator attract each other and keep the door closed.
冰箱里的磁铁相互吸引，使门保持关闭。
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3. The magnets on the compass point towards the earth's magnetic north.
指南针上的磁铁指向地球的磁北。