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Acids, like the weak acid present in your can of Coke, can react with oxides to effectively reverse the process of tarnishing.
而酸，比如可樂中的弱酸，和氧化物產生化學反應，能有效避免生銹。
The acid dissolves the metal oxides that make the tarnish, leaving only shiny metal behind.
酸可以分解金屬氧化物，化學反應后的金屬锃亮。
You can try this at home, even if you don't have a brass candle stick.
即便家里沒有銅燭臺，你可以做這樣的試驗：
Leave a tarnished old penny in a glass of cola overnight.
晚上，將一枚舊硬幣丟進裝有可樂的杯里。
In the morning it will be shiny and fresh.
第二天早上，硬幣就變得閃亮如新。
If the acid in cola is so good at attacking tarnished metal, what might it do to your insides?
如果可樂能有效清潔金屬銹斑，那么可樂對人體的內臟會產生什么影響呢?
Actually, your stomach already contains its own supply of acid which it uses to digest food.
事實上，人體的胃里就有分泌的酸液來消化食物。
This stomach acid is a great deal stronger than the acid in a can of Coke.
胃酸的酸性比一聽可樂還強。
Indeed, stomach acid would be an even better tarnish remover than cola!
說真的，胃酸甚至比可樂更能除銹。
譯文為可可英語翻譯，未經授權請勿轉載!
