1. The supermarket has five checkouts.2. The supermarket has five checkout counters.3. A lady was mugged when she was standing in the checkout line at the supermarket.
 checkout counter checkout這裡指的是商店裡的付帳的地方。checkout line = 為了付帳而排的隊
Student protesters against the Cross-Strait Service Trade Agreement have occupied Taiwan's egislature and are staging a sit-in.