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魔鬼经济

It's this keratinous substance that they use in their mouths to sort of strain the water.

他们用嘴里这种角质质来过滤水。

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尔伯塔大-恐龙古

A small and older relative of triceratops, has been found with fossilized remains of tall, keratinous bristles along its tail.

已发现三角龙一种体型较小且年长亲戚,其尾巴上有高大角质刚毛化石

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尔伯塔大-恐龙古

There's a slight discoloration in the rock, and what that is is the preservation of the keratinous nail, fingernail, of this bird.

岩石中有轻微变色,那是这只鸟角质指甲,手指甲保存。

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PBS地球-动趣闻

But in ornithurines this same area became covered in keratinous beak tissue, while they kept the teeth that were farther back in their jaws.

但在鸟科动中, 同样区域被角质喙组织覆盖,同时它们将更靠后牙齿保留在下巴中。

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