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A protective coating of colloidal silver is painted on the inside and outside of the filter to kill bacteria.
VOA: special.2009.06.22
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In an aqueous solution, he passes electric current and causes silver ions to deposit and form metallic silver.
在水溶液中，他接通电流，这得银离子,沉淀，并形成金属银。
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Everything -- gold, silver, diamonds, particles -- everything accelerates the same way in a gravitational field, due to this remarkable fact.
所有东西,金,银,钻石,粒子,所有东西,在引力场作用下都以相同的方式加速,原因就是这个显著的事实
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Everyone wanted gold. They took their paper money and their silver to the government and exchanged them for gold.
VOA: special.2010.06.17
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So platina is like a diminutive of silver, but we now know that platinum is far superior to silver It is far more noble. It has a higher melting point, a higher chemical inertness, a fantastic metal.
所以普拉塔就像一个小小的银，但我们现在知道普拉塔比银要好很多,更为珍贵，熔点更高，化学惰性更高，是一种非常不可思议的金属。
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To do this,he had to urge Congress to kill a law which forced the government to buy silver.
VOA: special.2010.06.24
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Then the relative price of gold versus silver shifted to the point that the gold with at the twenty-one shilling exchange rate the gold shilling was worth less the gold guinea was worth less than twenty-one shilling.
之后，金子相对于银子的相对价格,就移动到另一个值,在二十一个先令的兑换率下,金先令价值少于,金几尼的价值少于了二十一个先令的价值。
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By selling it to the government, the mining interests hoped to keep the price of silver from falling.
VOA: special.2010.06.03
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And, in any arbitrary crucible full of molten silver, half of them are going to be spin-up and half of them are going to be spin-down.
并且，在任一个浇满了熔银的坩埚中，银原子中的电子一半是向上转,另一半是向下转。
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Next,he went to the famous jewelry store, Tiffany's,and bought a tie pin and some brushes with silver handles.
VOA: special.2009.04.11
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At that time, both gold and silver were used to support the value of the American dollar.
VOA: special.2010.06.24
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That it was necessary to stop - for a while - all payments in gold or silver.
VOA: special.2009.01.01
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Many other Americans wanted the United States to support its money with both gold and silver.
VOA: special.2010.07.01
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That was when mines in the western United States began to produce large amounts of silver.
VOA: special.2010.06.17
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Bryan said the United States should continue to make and use both gold and silver money.
VOA: special.2010.06.24
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The deal was agreed to. Both the McKinley Tariff Bill and the Sherman Silver Purchase Bill were approved by Congress and signed by President Harrison.
VOA: special.2010.06.03
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Cleveland decided the only answer was to get Congress to kill the silver purchase law.
VOA: special.2010.06.17
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It was once home to many silver mines and towns that grew up around them.
VOA: special.2009.08.16
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Land was almost free. Some people wanted to find gold or silver and become rich.
VOA: special.2010.03.10
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New discoveries of gold and silver now were leading men to Colorado, Arizona and Nevada.
VOA: special.2009.05.28
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He urged them to kill the law which forced the government to buy silver.
VOA: special.2010.06.24
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To stop this, President Jackson ordered gold or silver payments only for government land.
VOA: special.2009.01.01
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Wealthy businessmen and bankers did not want to use silver money at all.
VOA: special.2010.06.17
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He had led an unsuccessful fight in Congress to keep America using silver.
VOA: special.2010.07.01
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President Cleveland believed he could get Congress to kill the silver purchase law.
VOA: special.2010.06.17
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It refused to accept the notes, or paper money, of these banks, unless the state banks were ready to exchange the paper for gold or silver money.
VOA: special.2009.01.01
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Paper money was used to represent a nation's gold and silver holdings.
VOA: special.2010.06.17
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He began to cough. The silver bells on his cap jingled.
VOA: special.2009.02.07
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The value of silver was tied to the value of gold.
VOA: special.2010.06.17
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The extra silver caused the price of the metal to fall.
VOA: special.2010.06.17
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