scruting of vouchers

例句：

1. 1. The car was given athorough scrutin after the accident.
   事故后，这辆车被彻底检查了一遍。
2. 2.The engineer used a special tool to smoothen the surface of the machine.
   工程师用一种特殊的工具来平滑机器的表面。
3. 3. The chefpolished the knives before serving themto the guests.
   厨师在给客人上菜前，把刀擦亮了。