It was the invention of the mechanical potato peeler in the 1920s that paved the way for potato chips to soar from a small specialty item to a top-selling snack food.

• 这促使了土豆削皮机器的发明，同时也为炸薯片在20世纪20年代从一种小点心变成一种畅销的食品打下坚实的基础。