This is because tectonic plates on our planet repeatedly recycle the surface, burying evidence from before the time life formed.

这是因为地球上的构造板块在地球复循环，掩埋了生命形之前的证据。

We think plate tectonics may have been really important for life on Earth, for the evolution of complex life on Earth.

我们认为板块构造可能对地球上的生命，特别是复杂生命的进化起到了非常重要的作用。

Luckily for me, I recently teamed up with my friends from Howtown on an episode for their channel all about plate tectonics.

幸的是，我最近与Howtown的朋友们合作，在他们专注于板块构造的频道上共同制作了一集节目。

On this orange, I've split the peel into different pieces, each of which can move independently, just as the tectonic plates are arranged on the Earth.

在这个橘子上，我把果皮同的部，每个部都可以独立移动，就像地球上的构造板块一样。

On the placid, plateless moon there is no such mechanism and it has been easy to assume that basalt is for the most part all the planet has to offer.

在平静且没有板块构造的月球上，存在这样的机制，因此很容易认为玄武岩就是这颗星球所能提供的全部。

Instead, their brains might be the limiting factor after all – even though the physical pieces are mostly in place, their neural circuitry just doesn’t give them the fine level of control they need to mimic human language.

相，他们的大脑可能是真正的限制因素——尽管身体上的构造基本到位，但他们的神经回路并没有提供足够精细的控制， 使它们能够模仿人类语言。