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PBS地球-物趣闻

Forming a notochord like those still found in some of today's jawless fish.

形成脊索,就仍然在一些无颌鱼中发现脊索一样。

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Awesome Nature

Perhaps the chordate crowd, with their notochords, segmented muscles and big bony skeletons.

或许是脊索物,有脊索,分节肌肉和干瘪大骨架。

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PBS地球-物趣闻

And the rod down its back was a notochord, an early precursor of the vertebral column seen in vertebrates.

杆是脊索,是脊椎物脊柱早期前身。

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PBS地球-物趣闻

For one thing, the white lines found on some of those fossils go past the eyestalks where true notochord would end.

一方面,在其中一些化石发现白线越过眼柄,而真正脊索应该在眼柄处结束。

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