supermarket subsystem definition record

例句：

1. 1. I went tothe supermarket yesterday and bought somegroceries.
   我昨天去了超市买了一些杂货。
2. 2. The supermarket is alwayscrowded with people shopping for daily necessities.
   超市总是挤满了购物的人们，他们为了日常必需品而购物。
3. 3. Supermarkets are essential places where we can finda wide variety of goods at reasonable prices.
   超市是我们能找到各种商品且价格合理的必要场所。