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
All the work I've been putting into this project has been all for nothin because my boss is shutting it down.