纪录片《地球劫难日》 第20期 金属元素铱

This quartz¹ had a very strange set of parallel fracture-like fused planes, running through it at several angles.

这种石英中有非常奇怪的平行裂丝状结构，从各个角度贯穿晶体。

Something had shuttered the quartz.

看来有什么东西破坏了石英。

Retallack knew that only a force of enormous size could create these patterns.

Retallack很清楚只有强力冲击才会造成这种纹理。

It seemed there must have been a huge meteor.

看起来这必定是大型天体所为。

It looks as though he had found the traces everybody had been looking for.

他似乎已找到了所有人梦寐以求的线索。

Yet again, something didn't fit.

可是新的问题又出现了。

As Retallack looked further at the new evidence, there was a surprise.

Retallack深入研究这些证据后有了惊人的发现。

The meteor that had wiped out the dinosaurs² had left huge quantities of shattered quartz.

消灭恐龙的陨石留下了大量的破碎石英。

It had also left traces of a metal mainly found in outer space called iridium.

还带来了主要存在于外太空的金属元素，铱。

It's a common component³ of meteors.

陨石中通常都有这种成分。

1 quartz   

n.石英

参考例句：

• There is a great deal quartz in those mountains.那些山里蕴藏着大量石英。
• The quartz watch keeps good time.石英表走时准。

2 dinosaurs   

n.恐龙( dinosaur的名词复数 )；守旧落伍的人，过时落后的东西

参考例句：

• The brontosaurus was one of the largest of all dinosaurs. 雷龙是所有恐龙中最大的一种。 来自《简明英汉词典》
• Dinosaurs have been extinct for millions of years. 恐龙绝种已有几百万年了。 来自《简明英汉词典》

3 component   

n.组成部分，成分，元件；adj.组成的，合成的

参考例句：

• Each component is carefully checked before assembly.每个零件在装配前都经过仔细检查。
• Blade and handle are the component parts of a knife.刀身和刀柄是一把刀的组成部分。