名词
中文翻译：电磁铁
同义词：
['electromagnetism', 'electromagnetic field']
例句：
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1.The magnetized coils are used to attract metal objects.
被磁化的线圈用于吸引金属物体。
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2. The scientist discovered a new type of magnet that can be controlled by electricity.
科学家发现了一种可以通过电力控制的磁铁新类型。
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3.The magnet is attached to the circuit board and can be used as a switch.
磁铁附在电路板上，可以用作开关。