Rather than a flexible lower jaw joint, they had a hinge between the upper jaws and the rest of the skull.

他们没有可活动的下颌关节，而是有一条筋腱连接着上颚和头骨。

youdao

Rather than a flexible lower jaw joint, they had a hinge between the upper jaws and the rest of the skull.

他们没有可活动的下颌关节，而是有一条筋腱连接着上颚和头骨。

youdao