auric oxide

例句：

1. 1. The iron oreis mined from the nearby mountains.
   铁矿石从附近的山中开采。
2. 2. Theiron oxide reactswith water to form rust.
   氧化铁与水反应形成锈。
3. 3. Theiron oxide is used in the productionof paints and pigments.
   氧化铁用于生产油漆和颜料。