One of the most famous stories about Galileo is that he once dropped two metal balls off the Leaning Tower of Pisa to prove that heavier objects do not fall faster than lighter ones.

关于伽利略有一个著名的故事：有一次他从比萨斜塔扔下两个铁球，想要证明较重的物体并不较轻的物体下落速度快。

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That last fact suggests gold benefits when markets are functioning — like now — but the metal, like other assets, can fall when markets close down.

最后一个事实表明，当市场正常运转时(比如现在)，黄金会带来好处，但当市场崩溃时，黄金也与其他资产一样会下跌。

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These regulations shall include the necessary measures for such symptoms as high water level alarming, metal temperature sharp fall or steam pipe vibration.

这些规定应包括有出现如高水位报警，金属温度急剧下降或蒸汽管道振动等征兆时必须采取的措施。

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The extra silver caused the price of the metal to fall.

VOA: special.2010.06.17

With the US debt bubble still firmly in place, Dietrich says investors should expect oil, commodities, gold and precious metal prices to rise again later this fall after taking a breather over the summer.

FORBES: No "Double Dip", But Gold Seen Rising as US Debt Woes Persist

Yet the show does not peak until shadows fall and Gnawa musicians start playing their metal qarqaba (castanets), duff (hand drums) and twanging three-stringed ginbri (bass).

BBC: Morocco��s best for street life: Marrakesh

It comes as the group reported a 58% fall in half-year net profit, knocked by weaker metal prices.

BBC: Marius Kloppers