it

2731 篇文章
And while it may not look like much,
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And while it may not look like much, 虽然看起来并不起眼

It has a new internal skeleton that makes it both fast and agile.
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It has a new internal skeleton that makes it both fast and agile. 它有一种新的内部骨骼 令它既快速又灵活

But what it has evolved will change the course of history.
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But what it has evolved will change the course of history. 但它进化出的特征将改变历史进程

It hasn't yet evolved a jaw,
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It hasn't yet evolved a jaw, 它尚未进化出颌

even when they can't see it.
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even when they can't see it. 即便看不见猎物 也能得手

Rolling into a ball, it becomes completely impenetrable.
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Rolling into a ball, it becomes completely impenetrable. 它卷成一团 变得无懈可击

Despite the trilobite's armor, it makes sense to keep out of sight.
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Despite the trilobite's armor, it makes sense to keep out of sight. 尽管三叶虫有护甲 但是保持隐蔽仍然是明智的做法

they need it.
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they need it. 它们确实需要外壳

It may seem like these shallows are a kind of Eden,
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It may seem like these shallows are a kind of Eden, 这些浅海看起来可能像是伊甸园

They may not look like it...
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They may not look like it... 虽然可能看起来不像