a commodity of brown paper的用法和样例：
- How many squares can you make from this one sheet of brown paper?
- She is carrying a parcel of book done up in brown paper.
- She was carrying a parcel of books done up in brown paper.
- Tom often wears a pair of brown shoes.
- This product is packed the bag of brown paper of lining damp proof paper bag and polybag or weave plastic bag, net weight is 25kgs.