深刻改变

The bacteria forming the stromatolites were the first life to photosynthesise

叠层石是第一种进行光合作用的物种

and release oxygen into our world.

生成氧气到我们的世界中

This led to one of the most profound changes in the history of Earth.

它们领导了一场地球史上最深刻的改变

Ultimately, the planet would have an atmosphere rich in oxygen,

最终，地球有了富含氧气的大气层

but before that could happen, something got in the way.

不过在此发生之前还有些阻碍

To see what stopped the oxygen reaching the atmosphere,

看看有什么阻止氧气到大气层

I'm heading deep into the Australian outback.

我朝澳大利亚内陆深入

Although this area is dry and dusty now,

虽然这一地区现在干燥和沙漠化

two and a half billion years ago these rocks were formed beneath the sea

二十五亿年前这些岩石是在海底下

and they hold the key to what happened to the oxygen.

它们是制造氧气的关键

Back then, the seas were rich in iron that was dissolved in the water.

那时候，海水里溶解了大量铁

When the oxygen given off by the stromatolites met the iron.

当叠层石生成的氧气遇到铁

they bonded together.

它们结合在一起

The result huge amounts of iron oxide formed, or as we usually know it, rust.

结果，生成了大量的铁氧化物或者如我们平时叫法，铁锈

重点讲解

1、release

释放;放出

He was released from custody the next day.

第二天他被从拘留所里放了出来。

He is expected to be released from hospital today.

他有望今天出院。

使免除;使免于

Divorce releases both the husband and wife from all marital obligations to each other.

离婚解除了夫妻双方相互之间所有的婚姻义务。

This releases the teacher to work with individuals who are having extreme difficulty.

这使得教师可以专门辅导学习特别吃力的学生。

发泄，释放(情感);展示(能力)

Becoming your own person releases your creativity.

保持自己的本色才有助于发挥自身创造力。

I personally don't want to release my anger on anyone else.

我个人并不想把自己的愤怒发泄在别人身上。

发布;发表;公布

They're not releasing any more details yet.

他们还未公布更多细节。

Figures released yesterday show retail sales were down in March.

昨天公布的数据显示零售额在3月份有所下滑。

2、dissolve

（使）溶解

Heat gently until the sugar dissolves.

慢慢加热直到糖溶解为止。

Dissolve the salt in a little boiled water.

将盐溶解在少许开水中。

解散(团体或机构)

The committee has been dissolved.

委员会已经解散了。

The King agreed to dissolve the present commission.

国王同意解散目前的委员会。

（使）消失;消除;消散

His new-found optimism dissolved.

他刚刚萌生的乐观情绪消失了。

Lenny still could not dissolve the nagging lump of tension in his chest.

莱尼仍不能消除令他不安的紧张感。