recarburizing

例句：

1. 1. The engineer used a special tool to reheat the metal parts.
   工程师用一种特殊的工具来重新加热金属部件。
2. 2. The car was reheated before it left the garage.
   汽车在离开车库前被重新加热。
3. 3. The old books were reheated in the microwave oven.
   旧书在微波炉里被重新加热。