free oxide

例句：

1. 1. Free oxides are formed during the reaction of two metals in a molten salt bath.
   在熔融盐浴中，两种金属反应时会产生自由氧化物。
2. 2. The formation of free oxides is a key step in the corrosion process.
   自由氧化物的形成是腐蚀过程的关键步骤。
3. 3. The study of free oxides has led to significant advancements in materials science and engineering.
   对自由氧化物的研究已经极大地推动了材料科学和工程的进步。