brown stain

• 褐变

brown stain的用法和样例：

例句

1. In this paper, the law of inhibiting browning stain of Maillard reaction were studied by experiments of adding sulphite.
   本文通过试验添加不同亚硫酸盐研究了美拉德褐变抑制的规律。
2. The preventing methods and the reasons of the pickled cabbage as chippings packed in plastic bags to turn brown and mildew was introduced in the store.
   介绍了袋装酸菜末在贮藏过程中褐变和霉变的原因及防治方法。