名词
中文翻译：铁芯
同义词：
['core', 'core body例句：1. The ballast body is crucial for maintaining the stability of the circuit.（铁芯对于保持电路的稳定性至关重要。）']
例句：
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1. The ballast body is crucial for maintaining the stability of the circuit.
铁芯对于保持电路的稳定性至关重要。
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2.The engineer carefully inspected the ballast body before installing it.
工程师在安装之前仔细检查了铁芯。
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3. The ballast body needs to be replaced regularly to ensure proper functioning.
铁芯需要定期更换以确保正常工作。