A somewhat controversial theory had been proposed about 25 years ago suggesting such dinosaurs were equipped with a hinge between the upper jaw and the rest of the skull.
在25年前，曾有人提出了一个很据争议的理论，认为这种恐龙的上颚有个肌腱和颅骨的其他部分连接。
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。
Now, while the rest of the group walked up a gully scanning for fossils, Berhane Asfaw and I headed down onto the flat plain to the spot where the skull had been found.
当小组中的其他人走入一条岩沟寻找化石时，我和博哈恩·阿斯范则下到那块平坦的平原之上，想探寻一下发现颅骨的地方。
Now, while the rest of the group walked up a gully scanning for fossils, Berhane Asfaw and I headed down onto the flat plain to the spot where the skull had been found.
当小组中的其他人走入一条岩沟寻找化石时，我和博哈恩·阿斯范则下到那块平坦的平原之上，想探寻一下发现颅骨的地方。
应用推荐