Meat is, at best, a secondary source of essential elements.
肉类充其量不过是身体基本要素的次要来源。
Additional food samples are currently being analysed to identify any potential secondary source of exposure.
目前还在对其它食物样本进行分析，以确定是否存在任何潜在的其它接触源。
Additional food samples are currently being analysed to identify any potential secondary source of exposure.
目前还在对其它食物样本进行分析，以确定是否存在任何潜在的其它接触源。
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