时差N小时 黄金是黄色的吗?(下)

If most gold jewelry¹ is an alloy², why is some white and some yellow?

如果大多数黄金首饰是合金的话，为什么有的是白色有的是黄色呢？

The final appearance depends on the type of alloy metal used.

珠宝外观最终取决于所使用合金金属类型。

Alloys³ made with white metals like silver, palladium and nickel create white-colored gold.

用银、钯和镍等白色金属制成的合金为白色的黄金。

Adding some copper⁴ to the alloy will restore the yellow color, but too much copper can turn the gold reddish.

在合金中加入铜可以恢复为黄色，但是铜过量会导致黄金变红。

The color of gold jewelry doesn’t reveal how much gold is in it — a piece of white gold may have the same number of carats as a piece of yellow gold.

黄金首饰的颜色并不能看出其含金量。一块白金的含金量可能与一块黄金的含金量相同。

But, it has a different alloy metal, and so it has a different color.

由于黄金里掺有不同的合金金属，因此黄金会呈现出不同的颜色。

Unlike white gold, fool’s gold has no gold in it at all. It’s a mineral called iron pyrite.

与白金不同，愚人金根本不含任何黄金。它其实是一种叫做黄铁矿的物质。

Black gold isn’t gold either, it’s oil. Which is also valuable, but doesn’t look as good on your fiancee’s finger.

黑金也不是黄金，而是石油。黑金同样很值钱，但是戴在未婚妻手上可不那么美观。

1 jewelry   

n.（jewllery）（总称）珠宝

参考例句：

• The burglars walked off with all my jewelry.夜盗偷走了我的全部珠宝。
• Jewelry and lace are mostly feminine belongings.珠宝和花边多数是女性用品。

2 alloy   

n.合金，(金属的)成色

参考例句：

• The company produces titanium alloy.该公司生产钛合金。
• Bronze is an alloy of copper and tin.青铜是铜和锡的合金。

3 alloys   

n.合金( alloy的名词复数 )

参考例句：

• This is essentially a development of thoria dispersion strengthened nickel alloys. 这基本上是用二氧化钍弥散强度化的镍基合金。 来自辞典例句
• The lack of deep hardening in these alloys negates their use. 这些合金缺乏深层硬化能力使它们无法利用。 来自辞典例句

4 copper   

n.铜；铜币；铜器；adj.铜(制)的；(紫)铜色的

参考例句：

• The students are asked to prove the purity of copper.要求学生们检验铜的纯度。
• Copper is a good medium for the conduction of heat and electricity.铜是热和电的良导体。