There are several reservoirs in the carbon cycle.

碳循环中有几个储层。

The carbon cycle in the forest goes on.

森林中的碳循环仍在继续。

(growling) (creepy music) Number 8 is the carbon cycle.

（咆哮）（令人毛骨悚然的音乐）数字 8 是碳循环。

This is because the carbon cycle of the seas is still mystifying.

这是因为海洋的碳循环仍然是个谜。

He's talking about mushrooms, and the part they play in the carbon cycle.

他说的是蘑菇， 以及它们在碳循环中的作用。

This carbon dioxide is released back into the atmosphere where it re-enters the carbon cycle.

这种二氧化碳被释放回大气中， 在那里它重新进入碳循环。

They are an important part of the carbon cycle, but what is a cycle?

它们是碳循环的重要组成部分， 但什么是循环？

I'd tell you about the carbon cycle, which is what I'm about to do.

我会告诉你碳循环， 这就是我要做的。

He says: and so the carbon cycle in the forest goes on.

他说：因此森林中的碳循环继续进行。

Therefore, if there’s not enough iron, then you have less biological activity, which, of course, affects the carbon cycle.

因此，如果铁含量不足， 生物活性就会降低， 这当然会影响碳循环。

" Defining the carbon cycle on Mars is absolutely key to trying to understand how life could fit into that cycle, " Steele said.

" 定义火星上的碳循环绝对是试图了解生命如何适应该循环的关键，" 斯蒂尔说。

She added that the discovery " has implications for understanding the carbon cycle on Mars, " as well as the possibility that the planet once supported life.

她补充说，这一发现“对了解火星上的碳循环具有重要意义”，也对了解火星上曾经存在生命的可能性有意义。

Environmentalists are particularly concerned about this, and they worry that this could disturb marine life and could possibly also interfere with the carbon cycle.

环保主义者对此尤为担忧，他们担心这会扰乱海洋生物， 也可能会干扰碳循环。

As I tracked the history of the carbon cycle through geologic time to present day, most of the students were slumped over, dozing or looking at their phones.

当我追踪从地质时代到今天的碳循环历史时，大多数学生都瘫倒在地、打瞌睡或看手机。

Since carbon is the stuff of life, one of the best ways of understanding the carbon cycle is just a whole bunch of things living and dying, and in the process swapping carbon.

由于碳是生命的组成部分，理解碳循环的最佳方式之一就是一大堆生死攸关的事物，并在此过程中交换碳。