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。
Bicycles, like all stuff made of metal, can rust.
自行车，像所有的东西，用金属，可以防锈。
If you leave your metal tools outside in the rain, they will rust.
如果你在雨天把金属工具放在外面，它们会生锈的。
Tremendous economic losses are suffered every year because of metal rust.
金属因生锈每年造成巨大经济损失。
这个金属不会生锈。
There is dent and rust of the metal shelf (hob), which need to be re-produced.
这些铁架有凹痕，有铁锈，需要返工处理。
Rust has eaten away at the metal frame.
这个金属框已被慢慢腐蚀了。
Oil preserves metal from rust.
油保护金属免于生锈。
Oil preserves metal from rust.
油保护金属免于生锈。
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