brown discoloration

• 褐变

brown discoloration的用法和样例：

例句

1. 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。