arsenic level in the hair
arsenic level in the hair
头发中的砷含量
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The normal reference value should be included both the lowest and highest hair arsenic levels in our country because the difference of hair arsenic level at different area had been proved.
证明不同地区正常人群发砷含量有差别，故制订我国人群发砷正常参考值时应包括全国发砷最低与最高值的范围。
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