In a study at Oregon State University, consumers were shown three samples of iceberg lettuce, two of them with varying degrees of light brown on the edges and at the base.
一项由俄勒冈州立大学发起的调查中，展示给了消费者三个卷心莴苣，其中两个的边缘和中心有着不同程度浅棕色。
Replace the nutritionally vacuous iceberg lettuce with baby spinach in tacos or mix sweet potatoes in your regular mashed potatoes.
可代替有营养的生菜或红薯和马铃薯的混合食物。
Now that spinach and iceberg lettuce have been approved, it is focusing on persuading the F.D.A. to permit irradiation of hot dogs and deli meats.
既然菠菜和卷心莴苣已经被批准，现在重心应放在说服美国食品及药物管理局批准热狗和熟食肉品采用辐照杀菌。
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