metal wood

例句：

1. 1. The car is made of steel.
   这辆车是用钢制造的。
2. 2. He used to work in a factory that produced alloys.
   他过去在一个生产合金的工厂工作。
3. 3. Metal detectors are used to search for buried treasures.
   金属探测器用于寻找埋藏的宝藏。