deoxidising agent 去氧剂
deoxidation process 去氧过程
A: Why is the metal turning dark?
A：为什么金属变黑了？
B: It has been oxidised; we need to deoxidise it.
B：它已经被氧化了；我们需要对其进行去氧处理。
1) 去除氧元素
2) 化学去氧
1. 去除（物质中的）氧或氧化物
verb
1. to remove oxygen from a substance by chemical means