纪录片《火星任务》 第29期 撞击坑（在线收听）

What we're going to do is an acid test.

我们所要做的是一项酸性测试

Take a few drops,

将数滴酸液

put it on the rock

滴到岩石上

and see if it fizzes.

观察是否冒泡

And yes, cool, it fizzes.

太好了 冒泡了

And what that tells us

这意味着

is that this work is made out of a mineral called carbonate.

这块岩石 是由名为碳酸岩的矿物质组成

And carbonates on Earth form in lots of water,

而地球上的碳酸岩是在大量水中形成的

and that tells us that this dry desert that we are in here today,

就是说 我们今天所处的这片沙漠

600 million years ago,

在600万年前

there was an ocean.

是一片海洋

It was liquid water in ancient lakes and seas

是古老的湖泊与海洋

that allowed life to take hold.

使生命得以延续

So Curiosity's scientists

因此好奇号团队的科学家们

have carefully chosen a Martian landing site

仔细挑选了跟莫哈韦沙漠类似的区域

similar to this spot in the Mojave Desert.

作为火星车的着陆点

Curiosity will hunt for the same evidence of a wetter past

好奇号将在火星的盖尔撞击坑中寻找

in the Gale Crater on Mars.

海洋存在的证据

Here's Gale Crater,

这里就是盖尔撞击坑

with Mount Sharp majestically rising above the plains.

夏普山从平原中拔地而起