It has a jaw that is hinged at the cranium and has bony, meaty, jointed fins.
它的下颚直接铰接在头骨上，还有多骨的，有肉的、有接缝的鳍。
At first, the bony landmarks of the base cranium were used to estimate the layer images.
首先以颅底骨性标志作为估计图像的层次。
At first, the bony landmarks of the base cranium were used to estimate the layer images.
首先以颅底骨性标志作为估计图像的层次。
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