The biological effect of extremely low frequency ( ELF ) electromagnetic field on human body is a question in dispute.

极低频 电磁场 是否对人体或生物存在不良影响,一直是学者们争议的课题.

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Objective To explore the relationship between extremely low frequency ( ELF ) magnetic fields and carcinogenesis.

目的　探讨极低频 ( ELF ) 磁场可能存在的促癌或协同促癌作用.

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