但是，在所有食肉动物中，下犬牙位于颌的前面，只有当嘴张大时上犬牙才能暴露出来。
But in all carnivores, the lower canines are in the front of jaws, and only if the mouth is wide open are the upper canines exposed.
几天以后，在该目击地的附近，化石猎手阿勒迈耶胡·阿斯范(Alemayehu Asfaw)有又发现了一片带有第一臼齿的儿童颌骨化石。
A couple of days later near the same spot, fossil hunter Alemayehu Asfaw found a piece of a child's jaw with a first molar tooth.
沙蚕的颌齿是由蛋白质跟锌离子结合而成。
Ragworm jaws are made of a mixture of protein and zinc ions.
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