名词
中文翻译：腐蚀膜
同义词：
['deteriorating film', 'corrosion film例句：1. The tarnished metal has been restored with a special coating.（经过特殊涂层处理后，这金属恢复了光泽。）']
例句：
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1. The tarnished metal has been restored with a special coating.
经过特殊涂层处理后，这金属恢复了光泽。
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2.The tarnished gold was polished to reveal its original shine.
经过抛光，那发黄的金器露出了它原有的光泽。
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3. The tarnished glass window needs replacing as it is scratched.
这个有划痕的镀膜玻璃窗户需要更换了。