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锌是人体不可缺少的微量元素,补锌可以促进儿童身体及智力发育。而美国专家日前进一步指出,12岁至13岁的儿童补锌更有利于提高其
Zinc is an indispensable trace element of the human body, zinc can promote children’s physical and mental development. The United States experts have further pointed out that children aged 12 to 13 years of zinc is more conducive to improving its