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近年来科学家研究发现:现代人体内的平均含铅量比古人高出500倍之多。铅元素在人体内含量过高危害是很大的:可导致记忆力下降、思维和判断能力迟
In recent years, scientists have found that the average lead content in modern people is 500 times higher than that of the ancients. Lead content in the human body is too high, the risk is great: can lead to memory loss, thinking and judgment late