rust on metal part 金属部位生锈
rust in metal 金属锈蚀
metal rust removing 金属除锈
Rust of metal structures 金属结构锈蚀
metal rust proofing 金属防锈预处理
Rust had eaten into the metal.
这金属已经锈坏。
One great advantage of this metal is that it doesn't rust.
这金属最大的一个优点就是不生锈。
Corrosion is an electro-chemical process by which a metal such as mild steel ,returns to its natural state ,state ,such as iron oxide or rust.
上面的译文便犯了定义过宽的错误。 试译：腐蚀是金属（如低碳钢）返回其天然状态（如氧化铁即铁锈）的电化学过程。
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