The scan revealed a tiny bone fragment that may be putting pressure on the optic nerves.

扫描发现有碎片挤压了视觉神经。

The snail shoots this little bony harpoon that it has concealed in this tube.

拉蒂夫：蜗牛射出它藏在管子里的叉。

Like Arabemys and later skin-shells, it has hundreds of ossicles in its shell.

与 Arabemys 和后的皮壳一样，它的壳中有。

And we do know that, over time, these ossicles became thinner and lighter, which helped make these turtles more buoyant.

我们确实知道， 随着时间的推移， 这些变得更薄、更轻，这有助于使这些海龟更加浮力。

And over time, that body plan gradually became even more specialized, with a new adaptation: bits of bone embedded in the leathery shell called ossicles.

随着时间的推移， 身体结构逐渐变得更加特殊，并有了新的适应：在称为的坚韧外壳中嵌入了一些头。