你可以把旧背包放在网上出售，这是一个很棒的主意。
It is such wonderful idea that you can put your old backpacks online for sale.
有时，他也会在网上出售他的泰迪熊，为生病的孩子筹集资金。
Sometimes, he also sells his teddy bears online to raise money for sick children.
这就必然产物信息在网上出售。
This makes information a natural product for sale on the Internet.
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