食物水来源调查采用双份饭法进行样品收集，测定食品中的水分。
The food samples were collected by using duplicate portion method and the water content of food samples were determined.
食物水来源调查采用双份饭法进行样品收集，测定食品中的水分。
The food samples were collected by using duplicate portion method and the water content of food samples were determined.
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