排队时，你会听到前面的人怎么买：一斤、两盒、扫码、找零、袋子。
When waiting in line, you will hear how the people in front of you buy things: one jin, two boxes, scan the code, change, bag
When waiting in line, you will hear how the people in front of you buy things: one jin, two boxes, scan the code, change, bag