They are an essential link in the chain of species.

它们是生物链中重要一环。

One of the links in the chain that drives the wheels had snapped.

驱动轮子的链条断了一节。

The binding isn't whole. There's a weak link in the chain.

团结不一致 整个环节就有了漏洞。

So, if that toad became extinct, we'd lose an important link in the chain of evolution, right?

所以，如果那种蟾蜍灭绝了的话，我们就会失去进化链中重要的一环，对吗？

So, if that toad became extinct, we'd lose an important link in the chain of evolution, right?

这么说的话，如果蟾蜍灭绝了，我们就会失去进化链中重要的一环，是这样吗？

The females are really the vital link in the chain here. They're the ones that are building the babies.

雌性是这个过程里关键的一环。是她们在繁育后代。

Well, it is an important link in the chain.

嗯，它是链条中的重要一环。

We're breaking a link in the chain of transmission.

我们正在打破传播链中的一个环节。

Yeah, so you know, we're all a link in the chain.

是的，所以你知道，我们都是链条中的一个环节。

It's transferred to the next link in the chain, the consumers.

它被转移到链条中的下一个环节，即消费者。

So the weak link in the chain, Marriott, is no longer a luxury.

所以链条中的薄弱环节万豪不再是奢侈品。

These weren't mere objects, after all; they were links in the chain that formed their parents' lifetime.

毕竟，这些不仅仅是物体；它们是物体。他们是构成父母一生的链条中的一环。

And when Marriott was killed, it had to be because he was the weak link in the chain.

当万豪被杀时， 一定是因为他是链条中的薄弱环节。

It was by concealing such links in the chain that Watson was enabled to produce his meretricious finales.

正是通过隐藏链条中的这些环节， 沃森才得以制作出他那华而不实的结局。

Dr Hahn has, however, found nine places along the amino-acid chain of killifish AHR where the link in the chain varies between individuals.

但沿AHR的氨基酸链上有9个部位的链接存在个体变异。

As I was saying, we have tried one link in the chain of old legends, and it just has done us no good.

正如我方才所说，我们已经用古老传说中的一件宝物做了试验，结果全无用处。

So, while sAC appears to be a unique link in the chain of sperm mobilisation, the body has built plenty of redundancy into its means of generating cAMP.

因此，尽管sAC似乎是精子移动链中的一个独特环节，但人体在其生成cAMP的过程中制造了大量的冗余。

The last link in the chain is the tail and searches in a sweeping motion for a robot to become the next link in the chain.

链条中的最后一个环节是尾巴，并以扫掠动作搜索机器人成为链条中的下一个环节。

If there are any weak links in the chain or any delays in moving from one link to the other the chain of survival will be greatly reduced.

如果链条中有任何薄弱环节或从一个环节转移到另一个环节的任何延误，生存链的效果将大大削弱。

And that acting as links in the chain of tradition and preserving cultural artifacts are some of the most fundamental sources of meaning a species can have.

作为传统链条中的一环和保护文化文物是一个物种可以拥有的一些最基本的意义来源。