buy a packet

例句：

1. 1. I need to buy some groceries for dinner.
   我需要买一些晚餐的杂货。
2. 2. The store sells a wide range of products.
   这家商店销售各种各样的产品。
3. 3. They bought the house for $500,000.
   他们以50万美元的价格买下了这所房子。