oxidizing and spontaneous combus-tion of rock and ore

例句：

1. 1. The process of oxidizing iron ore is crucial forthe production of steel.
   氧化铁矿石的过程对于钢铁生产至关重要。
2. 2. The oxidizingagent in this chemical reaction helps to speedup the reaction rate.
   这种化学反应中的氧化剂有助于加快反应速率。
3. 3. Theoxidizing atmospherecaused by the burning of fossilfuels contributes to climate change.
   燃烧化石燃料产生的氧化性大气对气候变化有贡献。