我们的祖先是草食动物，因此需要强壮的磨牙来混合和咀嚼植物。
Our ancestors, known to be herbivores, needed strong molars for mashing up and chewing plant material.
而有强壮颌骨的动物，如大猩猩和猩猩，则适应吃那些需要很多咀嚼的食物。
Animals with robust jaws, like gorillas and orang-utans, have long been known to be adapted to eating foods that require a lot of chewing.
依据该动物的颌骨计算表明，它能以15万牛顿的力度把猎物咬伤，咀嚼力度是霸王龙的四倍。
Calculations based on the animal's jaw bones suggest it could have bitten into its prey with a force of 150 kilonewtons, or four times the force thought to be exerted by the jaws of a T. rex.
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