柯林斯词典Jiffy bag 1. N a thickly padded but light envelope in which articles such as books are placed for protection in the post 邮寄图书等物所用的有衬垫夹层的大信封[trademark] 返回 Jiffy bag剑桥词典a brand name for a thick envelope for protecting objects that are easily damaged when they are sent by post （用于邮寄易损物品的）厚层信封 返回 Jiffy bag