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一九五七年 Schwarz 和 Foltz 证明硒是一种保护因子,硒是动物体内必需的微量元素。近几十年的流行病学和实验研究,学者
In 1957 Schwarz and Foltz demonstrated that selenium is a protective factor and selenium is an essential trace element in animals. Epidemiology and experimental research in recent decades, scholars