Same way, the cow's rumen, her stomach, is full of bugs.

同样，奶牛的胃，她的胃，充满了虫子。

And oregano was found to reduce the number of bacteria in the rumen to limit methane production.

牛至叶被发现可以减少胃中细菌的数量，从而限制甲烷的产生。

Foods like grass or hay stay in the rumen longer and produce more of it.

像草或干草这样的食物在胃中停留的时间更长，产生的量会更多。

The largest one, the rumen acts sort of as a storage unit where food can sit and ferment.

胃最大的一个，它可以作为食物存放和发酵的储存单元。

Or in the rumen of the cow.

或在牛的胃中。

It's very clear for ruminants, which are animals that have a rumen that eat grass.

对于反刍动物来说，这一点非常清楚，反刍动物有胃并以草为食的动物。

All the cells that live in the rumen of a cow for example.

例如，所有生活在牛胃中的细胞。

In the first part, called the rumen, microbes break down fibery plants like grass and give off methane as a byproduct.

在第一部分， 称为胃， 微生物分解草等纤维植物，并释放出甲烷作为副产品。

Other additives work too, like fatty acids which reduce methane by lowering the carbohydrate content and reducing a specific parasite in the rumen known as protozoa.

其他添加剂起了作用，比如脂肪酸，它通过降低碳水化合物含量和减少胃中被称为原生动物的特定寄生虫来减少甲烷。

And so if we think about the rumen of a cow, a cow is going to have many multiple parts inside their stomach.

而如果我们想想牛的胃，牛的胃里有很多部分。

Well the fungi are important, even though they make something like 5% of the living things in the rumen, they can breakdown specific bonds between the lignin inside the cellulose.

真菌很重要， 尽管它们在胃中的活体占比只有大约5%，但它们能够分解纤维素内部木质素之间的特定化学键。