例句：

　　The juice contains no artificial preservatives.

　　這種果汁不含人工防腐劑。

　　Nitrates are used as preservatives in food manufacture

　　硝酸鹽在食品加工業(yè)中被用作防腐劑。

　　She is also into building robots and testing preservatives in fast foods.

　　她還致力于機(jī)器人制造和快餐防腐劑檢測。