pickle acid

例句：

1. 1. They used to pickle their own vegetables at home.
   他们过去在家自己腌制蔬菜。
2. 2. The pickles are delicious and easy to make.
   这些腌菜美味且制作简单。
3. 3. Pickling is a common way to preserve food in many cultures.
   腌制是许多文化中常见的保存食物的方法。