Let's begin with a cleaning tip:
有個(gè)去污點(diǎn)子：
If you have some tarnished orcorroded brass thatyou want to clean, an old brass candlestickforexample, you can use Coca-Cola, or any other colasoftdrink, and that brass will come clean.
如果你想要清除銅銹，例如銅燭臺(tái)，可以使用可口可樂或者其它可樂飲料，清洗后的燭臺(tái)光亮如新。
And if Cola is such an effective cleaner of corrodedmetal , what is it doing to the inside ofyour stomach?
如果可樂能有效清潔金屬銹斑，那么可樂對(duì)人體的胃會(huì)產(chǎn)生什么影響呢?
Cola cleans brass because it's mildly acidic.
可樂能清潔銅銹是因?yàn)榭蓸烦嗜跛嵝浴?BR> Here's what happens:When brass or another metal alloy becomes tarnished, this means thattherehas been a chemical reaction between the oxygen in the air and one of the metals in thealloy.
銅或其它金屬合金生銹是因?yàn)榭諝庵械难鯕夂秃辖鹬械哪撤N金屬發(fā)生了化學(xué)反應(yīng)。
Oxygen atoms combine with metal atoms to form what's called an oxide, and this oxide iswhatmakes the metal appear tarnished.
氧原子結(jié)合了金屬原子，形成所謂的氧化物。氧化物就是金屬銹。
Acids, like the weak acid present in your can of Coke, can reactwith oxides to effectivelyreverse the process of tarnishing.
而酸，比如可樂中的弱酸，和氧化物產(chǎn)生化學(xué)反應(yīng)，能有效避免生銹。
The acid dissolves the metal oxides thatmake the tarnish, leaving only shiny metal behind.
酸可以分解金屬氧化物，化學(xué)反應(yīng)后的金屬锃亮。
You can try this at home, even if you don't have a brass candle stic
有個(gè)去污點(diǎn)子：
If you have some tarnished orcorroded brass thatyou want to clean, an old brass candlestickforexample, you can use Coca-Cola, or any other colasoftdrink, and that brass will come clean.
如果你想要清除銅銹，例如銅燭臺(tái)，可以使用可口可樂或者其它可樂飲料，清洗后的燭臺(tái)光亮如新。
And if Cola is such an effective cleaner of corrodedmetal , what is it doing to the inside ofyour stomach?
如果可樂能有效清潔金屬銹斑，那么可樂對(duì)人體的胃會(huì)產(chǎn)生什么影響呢?
Cola cleans brass because it's mildly acidic.
可樂能清潔銅銹是因?yàn)榭蓸烦嗜跛嵝浴?BR> Here's what happens:When brass or another metal alloy becomes tarnished, this means thattherehas been a chemical reaction between the oxygen in the air and one of the metals in thealloy.
銅或其它金屬合金生銹是因?yàn)榭諝庵械难鯕夂秃辖鹬械哪撤N金屬發(fā)生了化學(xué)反應(yīng)。
Oxygen atoms combine with metal atoms to form what's called an oxide, and this oxide iswhatmakes the metal appear tarnished.
氧原子結(jié)合了金屬原子，形成所謂的氧化物。氧化物就是金屬銹。
Acids, like the weak acid present in your can of Coke, can reactwith oxides to effectivelyreverse the process of tarnishing.
而酸，比如可樂中的弱酸，和氧化物產(chǎn)生化學(xué)反應(yīng)，能有效避免生銹。
The acid dissolves the metal oxides thatmake the tarnish, leaving only shiny metal behind.
酸可以分解金屬氧化物，化學(xué)反應(yīng)后的金屬锃亮。
You can try this at home, even if you don't have a brass candle stic