Scientists know that their body structures meant that they preyed on different dinosaurs.

科学家们知道它们的身体结构意味着它们捕猎不同恐龙。

Invertebrates from mollusks to coral to starfish all use calcium to build their bodies' support structures.

从软体动物到珊瑚再到海星，无脊椎动物都使用钙来构建身体的支撑结构。

And that bone, or osseous tissue, is just calcified connective tissue, perfect for supporting and protecting your body's various structures.

这种骨，或者说骨组织，是钙化的结缔组织，非常适合支撑和保护身体的各种结构。

One of the best ways of understanding your body's structures, after all, is studying what happens when something goes wrong with them.

毕竟，了解你身体结构的最好方法之一就是研究当它们出现问题时会发生什么。

Bones are more likely to fossilize than other body structures.

骨头比其他身体结构更容易变成化石。

And our stories, our narratives, are not just cognitive — they live in our bodies, and our bodies structure and shape our stories.

而我们的故事，我们的情节不只是认知上的，它们也会在我们的身体里上演，我们的身体组织、塑造了我们的故事。

That's because evolution usually works with what it has; new body structures don't crop up very often.

那是因为进化通常与它所拥有的一起工作；新的身体结构不会经常出现。

Can you imagine that insects, with their special body structure and power of senses, destroy about 10% of the world's food supplies every year?

你能想象具有特殊身体结构和感官能力的昆虫每年会破坏世界上大约 10% 的食物供应吗？

They are an example of a common theme in evolution, the more or less parallel development of different types of body structure and function for the same reason-in this case, for flight.

它们是进化的普通案例，不同身体结构或功能因飞行而平行发展。

According to historical experience, there are many possible causes which could lead an airplane to descend steeply, such as technical failures like engine malfunction, airplane body structure damage, or even bird strike.

根据历史经验，导致飞机急剧下降的原因有很多，例如发动机故障、机身结构损坏甚至鸟击等技术故障。

They have radial symmetry - with a mouth at their center and their other body structures repeating around it in sets of five, like the spokes on a wheel.

它们具有径向对称性——在它们的中心有一张嘴， 它们的其他身体结构以五个一组的形式围绕它重复，就像车轮上的辐条一样。