We were the bottom of the food chain.

我们处于食物链的底层。

People high up the food chain.

位高权重的人。

But the really important thing about hippo dung is its place in the food chain.

但河马粪便真正重要的意义在于其在食物链中的地位。

You're a little low on the food chain to...

你这食物链底层的没资格顶嘴。

Can't forget the bottom of the food chain, right?

不能忘记食物链的底层，对吧？

At the top of the food chain are the Raptors.

在食物链的顶端是迅猛龙。

To survive, some have shifted upward on the food chain.

为了生存，一些植物成为食物链上的逆袭者。

Once in farm animals, they become part of the food chain.

一旦农场动物使用抗菌素，那么抗菌素也会成为食物链的一部分。

From bees to dogs, we're moving up the food chain today.

从蜜蜂到狗，我们今天正在向食物链的上端移动。

Next comes a secondary consumer, the second consumer in the food chain.

接下来我们来认识一下食物链中的第二级消费者。

I should be at the top of the food chain by now.

我应该在食物链的顶端。

And this is when its impact reaches the top of the food chain.

此刻，这种影响传到了食物链的顶端。

This seems to be dangerous no matter where you are on the food chain.

对食物链中的任何生物这都是危险的。

No one knows what effects the GM material might have on the food chain.

没有知道转基因物质会对食物链产生什么影响。

It's called ocean acidification. Stressing marine ecosystems, coral reefs and the food chain.

这被称为“海洋酸化。海洋生态系统、珊瑚礁和食物链面临压力。

So what happens if we remove one species from the food chain?

那么，如果我们把一个物种从食物链中移除会发生什么呢？

We say that they are at the top of the food chain!

我们说它是站在食物链顶端的！

Living at the top of the food chain, sharks can accumulate dangerous levels of methylmercury.

因为生活在食物链的顶端，所以鲨鱼可以积累达到危险水平的汞。

They can be found in plastic materials and then by passing through the food chain.

它们可以在塑料材料中找到，然后通过食物链。

Russell says that artificial reef could set up a new dynamic in the food chain.

罗素表示人造礁可以建立食物链中新的形态。