noise slot mesauring frequency

例句：

1. 1. The slot machine is the centerpiece of the casino.
   老虎机是赌场的中心。
2. 2. The car had a broken slot in the dashboard.
   汽车的仪表盘有一个裂缝。
3. 3. The engineer checked the slot for any signs of wear.
   工程师检查了槽口是否有磨损的迹象。