So I'm going to take a sample...
我要取一点样品
here...
这里
dunk in the pH probe
插入检测探针
and we see that it's dropped below 3 already,
可以看到数值已经小于三
2.7
2.7
and it's levelling off at about 2.65, so that's acidic.
稳定在2.65左右 呈酸性
That's about 100,000 times more acidic than a normal river.
比普通河水的酸性强十万倍
And that's almost as acidic as stomach acid.
几乎和胃酸一样强
That is one acidic river.
这可真是一条酸河
If liquid water ever existed on Mars,
如果火星上真的有液态水
it might well have been a metallic acid river like this.
或许也会像这条河酸性一样强
It seems unlikely to think that life
在如此恶劣的环境中
could have emerged in such a hostile environment,
很难想象会有生命存在
but scientists have discovered this blood-red river
但是科学家发现在血红色的河水中
is actually teeming with microscopic bacteria.
充满了细菌
This is a microscope photograph of the river water
这是显微镜下的河水
and you can see these thin,
你可以在显微镜下
hair-like threadsdown the microscope,
看到这些头发般的细线
and these are the microbial filaments themselves,
它们是菌丝
these are the cells, these are the life in this water.
它们就是细胞 是水中的生命

重点解释：

1.more than 超过

例句：She wishes to be treated as nothing more than a common girl.
她希望被对待得只不过像一般的女孩子。

2.exist on 靠 ... 活下去； 靠 ... 生存

例句：They seem to exist on a different spiritual plane.
他们似乎生活在不同的精神境界。